fix asset

backend/src/app/services/asset_service.py

@@ -302,6 +302,8 @@ class AssetService:
         except ClientError as e:
             error_code = e.response.get("Error", {}).get("Code", "")
             if error_code == "NoSuchKey":
+                # File not found in S3 - delete asset from database
+                await self.asset_repo.delete(asset)
                 raise HTTPException(
                     status_code=status.HTTP_404_NOT_FOUND,
                     detail="Media file not found in storage",