fixed pylint issue

Author: Kanchan-Microsoft

src/backend/common/database/cosmosdb.py

@@ -109,7 +109,7 @@ async def create_batch(self, user_id: str, batch_id: UUID) -> BatchRecord:
 
                     self.logger.info("Returning existing batch record", batch_id=str(batch_id))
                     return BatchRecord.fromdb(batchexists)
-                
+
                 # This line should never be reached as all paths above either return or raise
                 raise RuntimeError(f"Unexpected state while processing batch {batch_id}")