As a preliminary step for including graphs of StreamCount data in our
analytics pages, add API support for fetching the chart data.
Care is taken to limit access to streams that the current user has
access to, which isn't necessary in similar views where the current
user is a server administrator by assumption.
Fixes part of #19653.
Co-authored-by: Tim Abbott <tabbott@zulip.com>
When calling some functions or assigning values to certain attributes,
the arguments/right operand do not match the exact type that the
functions/attributes expect, and thus we fix that by converting types
beforehand.
Lakshay Mittal
Anders Kaseorg
Lauryn Menard
Zixuan James Li
neiljp (Neil Pilgrim)
PIG208
Tim Abbott