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/env.py

@@ -25,7 +25,8 @@ target_metadata = metadata
 # ... etc.
 
 
-# No need to modify URL, using sync engine from db module
+# don't use asyncpg for the moment
+settings.DATABASE_URL = settings.DATABASE_URL.replace("+asyncpg", "")
 
 
 def run_migrations_offline() -> None: