* syncapi: add more tests; fix more bugs
bugfixes:
- The postgres impl of TopologyTable.SelectEventIDsInRange did not use the provided txn
- The postgres impl of EventsTable.SelectEvents did not preserve the ordering of the input event IDs in the output events slice
- The sqlite impl of EventsTable.SelectEvents did not use a bulk `IN ($1)` query.
Added tests:
- `TestGetEventsInRangeWithTopologyToken`
- `TestOutputRoomEventsTable`
- `TestTopologyTable`
* -p 1 for now
