* Fix /sync when we have no events
We used a since token of 0 to mean that no token was given. However, naffka
streams start at 0. This causes clients to get stuck spinning forever until an
event is sent.
This changes it so that we pass around pointers instead, with nil meaning a
since token wasn't given.
* Comment
* Fix unit tests
* Comments
* Fix typo
This has two benefits:
1. Using channels makes it easier to time out while waiting
2. Allows us to clean up goroutines that were waiting if we timeout the
request
* Clean roomserver consumer
* Make account data sync incremental
* Use a different name for the sync AD table
* Improved error logging
* Created missing topic in tests
* Add client API topic to tests
* Add client API topic to common
* Move data batch retrieval
* Add database index for data retrieval
* Fix typo in table name
* Fix indentation
