chore(backend): standardize multiline formatting across modules

Reformatted multiline function calls, object definitions, and queries for improved code readability and consistency. Adjusted imports and constraints where necessary.

backend/app/api/routes/events.py

@@ -199,7 +199,9 @@ async def stream_project_events(
     project_id: UUID,
     db: "AsyncSession" = Depends(get_db),
     event_bus: EventBus = Depends(get_event_bus),
-    token: str | None = Query(None, description="Auth token (for EventSource compatibility)"),
+    token: str | None = Query(
+        None, description="Auth token (for EventSource compatibility)"
+    ),
     authorization: str | None = Header(None, alias="Authorization"),
     last_event_id: str | None = Header(None, alias="Last-Event-ID"),
 ):