fix: Complete SQLAlchemy 2.0 migration - fix session parameter passing

- Update migration files to use SQLAlchemy 2.0 select() syntax
- Fix RoomController to use select(RoomModel) instead of rooms.select()
- Add session parameter to CalendarEventController method calls
- Update ics_sync.py service to properly manage sessions
- Fix test files to pass session parameter to controller methods
- Update test assertions for correct attendee parsing behavior

server/migrations/versions/4814901632bc_fix_duration.py

@@ -36,9 +36,7 @@ def upgrade() -> None:
 
     # select only the one with duration = 0
     results = bind.execute(
-        select([transcript.c.id, transcript.c.duration]).where(
-            transcript.c.duration == 0
-        )
+        select(transcript.c.id, transcript.c.duration).where(transcript.c.duration == 0)
     )
 
     data_dir = Path(settings.DATA_DIR)