The goal here is to make test_events.py be
primarily focused on testing specific actions
and then validating:
- schemas
- apply_events logic
Then the new module here is a bit of a
kitchen sink of old tests, although it's
primarily focused on the actual mechanics
of the event system:
- logging
- register
- queue_ids
- fetching initial state
- client descriptors
The classes toward the bottom arguably
should go into more feature-specific
test modules, but the main goal now is
to purify test_events.py. (We may eventually
want to rename test_events.py to something
more like test_action_events.py, but the
current name has some doc references and
tribal knowledge around it.)