This change adds support for importing guest users from a Mattermost
export file into Zulip. The function now checks the user's teams and
roles to determine whether the user is a guest on the team, and sets
the user's role accordingly. This ensures that the imported user data
includes the correct role for each user.
Fixes#23720.
This fixes a regression introduced in
9954db4b59, where the realm's default
language would be ignored for users created via API/LDAP/SAML,
resulting in all such users having English as their default language.
The API/LDAP/SAML account creation code paths don't have a request,
and thus cannot pull default language from the user's browser.
We have the `realm.default_language` field intended for this use case,
but it was not being passed through the system.
Rather than pass `realm.default_language` through from each caller, we
make the low-level user creation code set this field, as that seems
more robust to the creation of future callers.
Making request a mandatory kwarg avoids confusion about the meaning of
parameters, especially with `request` acquiring the ability to be None
in the upcoming next commit.
None of these tests seem to want to have tick=True, which is the
default. Letting the clock tick without a reason introduces the
possibility of nondeterministic test failures depending on the execution
time.
This reverts b8581e2895. The mobile
client on Android parses this field using:
```kotlin
timeMs = data.require("time").parseLong("time") * 1000
```
This throws an error if value is not `long` (i.e. an integer),
resulting in dropped notifications on Android from servers which had
deployed b8581e2895.
Switch back to sending an integer, but keep the behaviour from
fd6091ad17 where we send the timestamp in the payload of both
Android and Apple push notifications.
Rather than fetch all UserMessage rows for all streams, and subtract
those out in Python-space from the list of all Message rows the user
may have received -- do this via a "NOT EXISTS" subquery. This is
much better indexed (performing in fractions of milliseconds rather
than hundreds), and also consumes much less memory.
Adds support for bulk-adjusting a single user's membership in multiple
user groups in a single transaction in the low-level actions
functions, for future use by work on #9957.
This kind of payload that's loaded from json in the body of the request
is not only used for webhooks, but also in the push bouncer, and may get
used elsewhere too - so a general name is better.
Earlier, 'is_row_muted' returned 'true' if the message was in
a muted stream or muted topic.
If the message is in an unmuted or followed topic in a muted
stream, such topics should be treated as not muted topics
in an unmuted stream.
This commit fixes the incorrect behavior.
Now, for wildcard mentions, 'unread_msgs.mentions' exclude
the IDs in muted streams only if the message is in default or
muted topic.
Also, 'unread_msgs.count' takes into account the unreads in unmuted
or followed topics in muted streams too.
Documents that this bug was fixed in the API changelog.
Update 'get_muted_stream_ids' to return a set of IDs
instead of a list.
This will help to avoid linear time search operations later
while using 'if stream_id in muted_streams_ids'.
A comment was added in f797604 to convey that the unread count
at that time doesn't exclude the unreads in muted topics.
848c080 added the support to exclude the muted topic;
however, the comment was not updated.
This commit updates the comment to reflect the current behavior.
This is an exception that we should be generally catching like the
others, which will give our standard /login/ redirect and proper logging
- as opposed to a 500 if we don't catch.
Addresses directly a bug we occurred in the wild, where a SAMLResponse
was submitted without issuers specified in a valid way, causing this
exception. The added test tests this specific type of scenario.
These queries benefit from the increased specificity of using the
realm / recipient / sender indexes. The argument from 11a1cb9630
does not apply in these cases, since there are only 2 usermessage rows
for each matching message row for DMs, and few more than that for
huddles.
This commit adds a `jitsi_server_url` field to the Realm model, which
will be used to save the URL of the custom Jitsi Meet server. In
the database, `None` will encode the server-level default. We can't
readily use `None` in the API, as it could be confused with "field not
sent". Therefore, we will use the string "default" for this purpose.
We have also introduced `server_jitsi_server_url` in the `/register`
API. This will be used to display the server's default Jitsi server
URL in the settings UI.
The existing `jitsi_server_url` will now be calculated as
`realm_jitsi_server_url || server_jitsi_server_url`.
Fixes a part of #17914.
Co-authored-by: Gaurav Pandey <gauravguitarrocks@gmail.com>
The unique index on `(user_id, message_id)` that is the
`zerver_usermessage` table is rather specific, and even the PostgreSQL
extended statistics are not enough for it to realize there is a
correlation between the `realm_id` in the message table and the
`user_id` in the usermessage table. This means that adding the
`realm_id` limit when there is a join to `zerver_usermessage` flips
the query plan from a nested loop of unique usermessage index-only
scan, with an index scan of the messages pkey -- to a parallel hash
join of the messages limit with a index scan of just the user_id limit
on usermessages. It thinks this is necessary because it thinks that
the `realm_id` limit may remove a large number of messages from the
usermessage set -- which is totally untrue.
Remove the `realm_id` limit if we have a usermessage join.
This endpoint verifies that the services that Zulip needs to function
are running, and Django can talk to them. It is designed to be used
as a readiness probe[^1] for Zulip, either by Kubernetes, or some other
reverse-proxy load-balancer in front of Zulip. Because of this, it
limits access to only localhost and the IP addresses of configured
reverse proxies.
Tests are limited because we cannot stop running services (which would
impact other concurrent tests) and there would be extremely limited
utility to mocking the very specific methods we're calling to raising
the exceptions that we're looking for.
[^1]: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
The `expected` flag was incredibly confusing, as you
couldn't tell from the calling code what you were
actually expecting to happen.
I avoid the context manager idiom in order to force
the callers to create simple helper functions, and
I de-duplicate some code in some places.
I also force the caller to explicitly soft-deactivate
the user with one simple line of code, so that the
person reading the test doesn't have to research
the side effects of the helper. (And I make it
very easy for new authors to follow the practice
going forward.)
This is also somewhat of a prep commit to avoid
the obfuscated use of refresh_from_db.
I add a bunch of cute helper methods to make
the test a bit more readable.
And then I make sure to get clean objects,
which precludes the need for our callback
functions to refresh the user objects.
And finally I make sure that our validation
functions don't cause any round trips (assuming
we have fetched objects using a standard
Zulip helper, which example_user ensures.)
In feature levels 153 and 154, a new value of "partially_completed"
for `result` in a success (HTTP status code 200) was added for two
endpoints that process messages in batches: /api/delete-topic and
/api/mark-all-as-read.
Prior to these changes, `result` was either "success" or "error" for
all responses, which was a useful API invariant to have for clients.
So, here we remove "partially_completed" as a potential value for
"result" in a response. And instead, for the two endpoints noted
above, we return a boolean field "complete" to indicate if the
response successfully deleted/marked as read all the targeted
messages (complete: true) or if only some of the targeted messages
were processed (complete: false).
The "code" field for an error string that was also returned as part
of a partially completed response is removed in these changes as
well.
The web app does not currently use the /api/mark-all-as-read
endpoint, but it does use the /api/delete-topic endpoint, so these
changes update that to check the `complete` boolean instead of the
string value for `result`.
This adds support for syncing user role via the newly added "role"
attribute, which can be set to either of
['owner', 'administrator', 'moderator', 'member', 'guest'].
Removes durable=True from the atomic decorator of do_change_user_role,
as django-scim2 runs PATCH operations in an atomic block.
This is a prep commit to separate the single test
'test_stream_send_message_events' into two separate tests named
'test_stream_send_message_events' & test_stream_update_message_events'
to verify the events related to send and update message, respectively.
As a part of introducing two new user settings
* 'automatically_follow_topics_policy'
* 'automatically_unmute_topics_policy'
in the next commit, we will extend 'test_stream_send_message_events'.
This logical separation helps in avoiding a single, super-long test.
This commit removes the stray values, i.e., [1, 2, 3], used
in the tests for desktop_icon_count_display.
We use 'UserProfile.DESKTOP_ICON_COUNT_DISPLAY_CHOICES' instead.
'test_change_user_settings' in 'UserDisplayActionTest' excludes
the notification settings and tests only the display settings.
The code block excluding the notification settings doesn't exclude
'modern_notification_settings'. It only excludes the
'notification_settings_legacy'.
This commit replaces 'notification_settings_legacy' with
'notification_setting_types', which consists of all the
notification settings.
The query plan for fetching recent messages from the arbitrary set of
streams formed by the intersection of 30 random users can be quite
bad, and can descend into a sequential scan on `zerver_recipient`.
Worse, this work of pulling recent messages out is redone if the
stream appears in the next batch of 30 users.
Instead, pull the recent messages for a stream on a one-by-one basis,
but cache them in an in-memory cache. Since digests are enqueued in
30-user batches but still one-realm-at-a-time, work will be saved both
in terms of faster query plans whose results can also be reused across
batches.
This requires that we pull the stream-id to stream-name mapping for
_all_ streams in the realm at once, but that is well-indexed and
unlikely to cause performance issues -- in fact, it may be faster
than pulling a random subset of the streams in the realm.
This is designed to help PostgreSQL have better specificity and
locality in its indexes. Subsequent commits will adjust the code to
make sure that we use these indexes rather than the `realm_id`-less
versions.
We do not add a `realm_id` variation to the full-text index, since
it is a GIN index; multi-column GIN indexes are not terribly
performant, require the `btree_gin` extension for `int` types (which
requires superuser privileges on PostgreSQL 12 and earlier), and
cannot be consistently added concurrently on running instances.
After all indexes have been made, we also run `CREATE STATISTICS` in
order to give PostgreSQL the opportunity to realize that recipient and
sender are highly correlated with message realm, allowing it to
estimate that `(realm_id, recipient_id)` is likely as specific as
matching a given `recipient_id`, instead of as likely as matching
`realm_id` times matching a `recipient_id`. Finally, those statistics
must be filled by `ANALYZE zerver_message`, which is run last.
We now have a `realm_id` on Message; use it, rather than having to
check the sender's realm. This is theoretically different for
cross-realm bots, but these changes are all in tests where that does
not apply.
When searching for links inside a topic name, the question mark (?)
was used to split the topic. If a URL had a query after the URL
(e.g., "?foo=bar"), then the query was trimmed from the URL.
Removing the question mark from `basic_link_splitter` is sufficient
to fix this issue. The `get_web_link_regex` function then removes
the trailing punctuation if any, including literal question marks.
Fixes#26368.
Transifex has parameters that need to be parsed from JSON and converted
to int. Note that we use Optional[Json[int]] instead of
Json[Optional[int]] to replicate the behavior of json_validator. This
caveat is explained in a new test called test_json_optional.
This demonstrates the use of BaseModel to replace a check_dict_only
validator.
We also add support to referring to $defs in the OpenAPI tests. In the
future, we can descend down each object instead of mapping them to dict
for more accurate checks.
This demonstrates some basic use cases of the Json[...] wrapper with
@typed_endpoint.
Along with this change we extend test_openapi so that schema checking
based on function signatures will still work with this new decorator.
Pydantic's TypeAdapter supports dumping the JSON schema of any given type,
which is leveraged here to validate against our own OpenAPI definitions.
Parts of the implementation will be covered in later commits as we
migrate more functions to use @typed_endpoint.
See also:
https://docs.pydantic.dev/latest/api/type_adapter/#pydantic.type_adapter.TypeAdapter.json_schema
For the OpenAPI schema, we preprocess it mostly the same way. For the
parameter types though, we no longer need to use
get_standardized_argument_type to normalize type annotation, because
Pydantic dumps a JSON schema that is compliant with OpenAPI schema
already, which makes it a lot convenient for us to compare the types
with our OpenAPI definitions.
Do note that there are some exceptions where our definitions do not match
the generated one. For example, we use JSON to parse int and bool parameters,
but we don't mark them to use "application/json" in our definitions.
We want to reject ambiguous type annotations that set ApiParamConfig
inside a Union. If a parameter is Optional and has a default of None, we
prefer Annotated[Optional[T], ...] over Optional[Annotated[T, ...]].
This implements a check that detects Optional[Annotated[T, ...]] and
raise an assertion error if ApiParamConfig is in the annotation. It also
checks if the type annotation contains any ApiParamConfig objects that
are ignored, which can happen if the Annotated type is nested inside
another type like List, Union, etc.
Note that because
param: Annotated[Optional[T], ...] = None
and
param: Optional[Annotated[Optional[T], ...]] = None
are equivalent in runtime prior to Python 3.11, there is no way for us
to distinguish the two. So we cannot detect that in runtime.
See also: https://github.com/python/cpython/issues/90353
The goal of typed_endpoint is to replicate most features supported by
has_request_variables, and to improve on top of it. There are some
unresolved issues that we don't plan to work on currently. For example,
typed_endpoint does not support ignored_parameters_supported for 400
responses, and it does not run validators on path-only arguments.
Unlike has_request_variables, typed_endpoint supports error handling by
processing validation errors from Pydantic.
Most features supported by has_request_variables are supported by
typed_endpoint in various ways.
To define a function, use a syntax like this with Annotated if there is
any metadata you want to associate with a parameter, do note that
parameters that are not keyword-only are ignored from the request:
```
@typed_endpoint
def view(
request: HttpRequest,
user_profile: UserProfile,
*,
foo: Annotated[int, ApiParamConfig(path_only=True)],
bar: Json[int],
other: Annotated[
Json[int],
ApiParamConfig(
whence="lorem",
documentation_status=NTENTIONALLY_UNDOCUMENTED
)
] = 10,
) -> HttpResponse:
....
```
There are also some shorthands for the commonly used annotated types,
which are encouraged when applicable for better readability and less
typing:
```
WebhookPayload = Annotated[Json[T], ApiParamConfig(argument_type_is_body=True)]
PathOnly = Annotated[T, ApiParamConfig(path_only=True)]
```
Then the view function above can be rewritten as:
```
@typed_endpoint
def view(
request: HttpRequest,
user_profile: UserProfile,
*,
foo: PathOnly[int],
bar: Json[int],
other: Annotated[
Json[int],
ApiParamConfig(
whence="lorem",
documentation_status=INTENTIONALLY_UNDOCUMENTED
)
] = 10,
) -> HttpResponse:
....
```
There are some intentional restrictions:
- A single parameter cannot have more than one ApiParamConfig
- Path-only parameters cannot have default values
- argument_type_is_body is incompatible with whence
- Arguments of name "request", "user_profile", "args", and "kwargs" and
etc. are ignored by typed_endpoint.
- positional-only arguments are not supported by typed_endpoint. Only
keyword-only parameters are expected to be parsed from the request.
- Pydantic's strict mode is always enabled, because we don't want to
coerce input parsed from JSON into other types unnecessarily.
- Using strict mode all the time also means that we should always use
Json[int] instead of int, because it is only possible for the request
to have data of type str, and a type annotation of int will always
reject such data.
typed_endpoint's handling of ignored_parameters_unsupported is mostly
identical to that of has_request_variables.
This is important because the "guests" value isn't one that we'd
expect anyone to pick intentionally, and in particular isn't an
available option for the similar/adjacent "email invitations" setting.
This commit rename the existing setting `Who can invite users to this
organization` to `Who can send email invitations to new users` and
also renames all the variables related to this setting that do not
require a change to the API.
This was done for better code readability as a new setting
`Who can create invite links` will be added in future commits.
This commit does the backend changes required for adding a realm
setting based on groups permission model and does the API changes
required for the new setting `Who can create multiuse invite link`.
Previously (with ERROR_REPORTING = True), we’d stuff the entire
traceback of the initial exception into the subject line of an error
email, and then also send a separate email for the JSON 500 response.
Instead, log one error with the standard Django format.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
'test_get_message_payload_gcm_stream_message' verifies the payload
for notifications generated (for stream messages) due to any of the
push notification triggers, including
'NotificationTriggers.STREAM_PUSH'.
Earlier, 'test_get_message_payload_gcm_stream_notifications' tested
the same thing as 'test_get_message_payload_gcm_stream_message' with
the only difference that it included content that was not truncated.
This commit removes the test
'test_get_message_payload_gcm_stream_notifications' and updates
the test 'test_get_message_payload_gcm_stream_message' to cover
both the cases, i.e., truncated as well as not truncated content.
This commit removes the 'alert' field from the payload for
Android via GCM/FCM.
The alert strings generated do not get used at all and have
not been used since at least 2019. On Android, we construct
the notification UI ourselves in the client, and we ignore
the alert string.
Creates process for demo organization owners to add an email address
and password to their account.
Uses the same flow as changing an email (via user settings) at the
beginning, but then sends a different email template to the user
for the email confirmation process.
We also encourage users to set their full name field in the modal for
adding an email in a demo organization. We disable the submit button
on the form if either input is empty, email or full name.
When the user clicks the 'confirm and set password' button in the
email sent to confirm the email address sent via the form, their
email is updated via confirm_email_change, but the user is redirected
to the reset password page for their account (instead of the page for
confirming an email change has happened).
Once the user successfully sets a password, then they will be
prompted to log in with their newly configured email and password.
Since an email address is not required to create a demo organization,
we need a Zulip API email address for the web-app to use until the
owner configures an email for their account.
Here, we set the owner's `email_address_visibility` to "Nobody" when
the owner's account is created so that the Zulip API email field in
their profile is a fake email address string.
To make creation of demo organizations feel lightweight for users,
we do not want to require an email address at sign-up. Instead an
empty string will used for the new realm owner's email. Currently
implements that for new demo organizations in the development
environment.
Because the user's email address does not exist, we don't enqueue
any of the welcome emails upon account/realm creation, and we
don't create/send new login emails.
This is a part of #19523.
Co-authored by: Tim Abbott <tabbott@zulip.com>
Co-authored by: Lauryn Menard <lauryn@zulip.com>
Updates the API error response when there is an unknown or
deactivated user in the `principals` parameter for either the
`/api/subscribe` or `/api/unsubscribe` endpoints. We now use
the `access_user_by_email` and `access_user_by_id` code paths,
which return an HTTP response of 400 and a "BAD_REQUEST" code.
Previously, an HTTP response of 403 was returned with a special
"UNAUTHORIZED_PRINCIPAL" code in the error response. This code
was not documented in the API documentation and is removed as
a potential JsonableError code with these changes.
Fixes#26593.
The 'startinline' option is utilized in the `CodeHilite` instantiation
to indicate that the provided PHP code snippet should be highlighted
even if it doesn't start with the opening tag or marker of the
associated programming language (which will rarely be the case in
Zulip, since one discusses a section of a file much more often than a
whole file).
Fixes: https://chat.zulip.org/#narrow/stream/137-feedback/topic/php.20syntax.20highlighting.20should.20not.20require.20.60.3C.3Fphp.60.
Signed-off-by: Akshat <akshat25iiit@gmail.com>
This commit adds a test to verify the payload
'get_message_payload_apns' returns when the notification trigger is
'NotificationTriggers.FOLLOWED_TOPIC_PUSH'.
This commit updates the 'get_apns_alert_subtitle' function to
return a common subtitle, i.e., "{full_name} mentioned everyone:"
for wildcard mentions.
The triggers for the stream or topic wildcard mentions include:
* NotificationTriggers.TOPIC_WILDCARD_MENTION_IN_FOLLOWED_TOPIC
* NotificationTriggers.STREAM_WILDCARD_MENTION_IN_FOLLOWED_TOPIC
* NotificationTriggers.TOPIC_WILDCARD_MENTION
* NotificationTriggers.STREAM_WILDCARD_MENTION
This PR implements the audio call feature for Zoom. This is done by explicitly
telling Zoom to create a meeting where the host's video and participants' video
are off by default.
Another key change is that when creating a video call, the host's and
participants' video will be on by default. The old code doesn't specify that
setting, so meetings actually start with video being off. This new behavior has
less work for users to do. They don't have to turn on video when joining a call
advertised as "video call". It still respects users' preferences because they
can still configure their own personal setting that overrides the meeting
defaults.
The Zoom API documentation can be found at
https://developers.zoom.us/docs/api/rest/reference/zoom-api/methods/#operation/meetingCreateFixes#26549.
We now send stream creation and stream deletion events on
changing a user's role because a user can gain or lose
access to some streams on changing their role.
There was a bug in apply_event code where only a stream which
is not private is added to the "never_subscribed" data after
a stream creation event. Instead, it should be added to the
"never_subscribed" data irrespective of permission policy of
the stream as we already send stream creation events only to
those users who can access the stream. Due to the current
bug, private streams were not being added to "never_subscribed"
data in apply_event for admins as well. This commit fixes it
and also makes sure the "never_subscribed" list is sorted
which was not done before and was also a bug.
The bugs mentioned above were unnoticed as the tests did not
cover these cases and this commit also adds tests for those
cases.
Users who used to be subscribed to a private stream and have been
removed from it since retain the ability to edit messages/topics, and
delete messages that they used to have access to, if other relevant
organization permissions allow these actions. For example, a user may be
able to edit or delete their old messages they posted in such a private
stream. An administrator will be able to delete old messages (that they
had access to) from the private stream.
We fix this by fixing the logic in has_message_access (which lies at the
core of our message access checks - access_message() and
bulk_access_messages())
to not rely on only a UserMessage row for checking access but also
verify stream type and subscription status.
**Background**
User groups are expected to comply with the DAG constraint for the
many-to-many inter-group membership. The check for this constraint has
to be performed recursively so that we can find all direct and indirect
subgroups of the user group to be added.
This kind of check is vulnerable to phantom reads which is possible at
the default read committed isolation level because we cannot guarantee
that the check is still valid when we are adding the subgroups to the
user group.
**Solution**
To avoid having another transaction concurrently update one of the
to-be-subgroup after the recursive check is done, and before the subgroup
is added, we use SELECT FOR UPDATE to lock the user group rows.
The lock needs to be acquired before a group membership change is about
to occur before any check has been conducted.
Suppose that we are adding subgroup B to supergroup A, the locking protocol
is specified as follows:
1. Acquire a lock for B and all its direct and indirect subgroups.
2. Acquire a lock for A.
For the removal of user groups, we acquire a lock for the user group to
be removed with all its direct and indirect subgroups. This is the special
case A=B, which is still complaint with the protocol.
**Error handling**
We currently rely on Postgres' deadlock detection to abort transactions
and show an error for the users. In the future, we might need some
recovery mechanism or at least better error handling.
**Notes**
An important note is that we need to reuse the recursive CTE query that
finds the direct and indirect subgroups when applying the lock on the
rows. And the lock needs to be acquired the same way for the addition and
removal of direct subgroups.
User membership change (as opposed to user group membership) is not
affected. Read-only queries aren't either. The locks only protect
critical regions where the user group dependency graph might violate
the DAG constraint, where users are not participating.
**Testing**
We implement a transaction test case targeting some typical scenarios
when an internal server error is expected to happen (this means that the
user group view makes the correct decision to abort the transaction when
something goes wrong with locks).
To achieve this, we add a development view intended only for unit tests.
It has a global BARRIER that can be shared across threads, so that we
can synchronize them to consistently reproduce certain potential race
conditions prevented by the database locks.
The transaction test case lanuches pairs of threads initiating possibly
conflicting requests at the same time. The tests are set up such that exactly N
of them are expected to succeed with a certain error message (while we don't
know each one).
**Security notes**
get_recursive_subgroups_for_groups will no longer fetch user groups from
other realms. As a result, trying to add/remove a subgroup from another
realm results in a UserGroup not found error response.
We also implement subgroup-specific checks in has_user_group_access to
keep permission managing in a single place. Do note that the API
currently don't have a way to violate that check because we are only
checking the realm ID now.
Adds typing notification constants to the response given by
`POST /register`. Until now, these were hardcoded by clients
based on the documentation for implementing typing notifications
in the main endpoint description for `api/set-typing-status`.
This change also reflects updating the web-app frontend code
to use the new constants from the register response.
Co-authored-by: Samuel Kabuya <samuel.mwangikabuya@kibo.school>
Co-authored-by: Wilhelmina Asante <wilhelmina.asante@kibo.school>
Fixes#11767.
Previously multi-character emoji sequences weren't matched in the
emoji regex, so we'd convert the characters to separate images,
breaking the intended display.
This change allows us to match the full emoji sequence, and
therefore show the correct image.
There is no need to get realm for sender as ScheduledMessage
object also has realm field.
There is no direct benefit of this change but it is nice to
maintain the pattern which we want to follow in the code
in tests as well.
We can directly get the realm object from Message object now
and there is no need to get the realm object from "sender"
field of Message object.
After this change, we would not need to fetch "sender__realm"
field using "select_related" and instead only passing "realm"
to select_related when querying Message objects would be enough.
This commit also updates a couple of cases to directly access
realm ID from message object and not message.sender. Although
we have fetched sender object already, so accessing realm_id
from message directly or from message.sender should not matter,
but we can be consistent to directly get realm from Message
object whenever possible.
We do not set realm to Message objects defined for markdown tests
and this works because we currently access realm from sender object.
This commit changes the code to set realm in Message objects as
we would be accessing realm from Message object directly in further
commits.
We set stream_weekly_traffic field to "null" for Subscription
objects in zephyr mirror realm as we do not need stream traffic
data in zephyr mirror realm. This makes the subscription data
consistent with steams data.
This commit also udpates test to check never_subscribed data for
zephyr mirror realm.
Migrates existing ScheduledEmails for onboarding emails that have
either "zerver/emails/followup_day1" or "zerver/emails/followup_day2"
as the email template prefix to instead use the new template
prefixes "zerver/emails/account_registered" and
"zerver/emails/zulip_onboarding_topics".