Made listeners only work for listenable connections.

data/crud.py

@@ -38,6 +38,10 @@ async def read_all_connections(db: AsyncSession):
     result = await db.execute(select(Connection))
     return result.scalars().all()
 
+async def read_all_listenable_connection(db:AsyncSession):
+    result = await db.execute(select(Connection).filter(Connection.listen_updates == True))
+    return result.scalars().all()
+
 async def create_connection(db: AsyncSession, connection: ConnectionCreate, user_id: int):
     db_connection = Connection(**connection.model_dump(), owner_id=user_id)
     db.add(db_connection)