fix(backend): fix error messages (#2917)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

backend/api/quivr_api/modules/sync/utils/upload.py

@@ -62,19 +62,27 @@ async def upload_file(
     except Exception as e:
         print(e)
 
-        notification_service.update_notification_by_id(
-            notification_id,
-            NotificationUpdatableProperties(
-                status=NotificationsStatusEnum.ERROR,
-                description=f"There was an error uploading the file: {e}",
-            ),
-        )
         if "The resource already exists" in str(e):
+            notification_service.update_notification_by_id(
+                notification_id,
+                NotificationUpdatableProperties(
+                    status=NotificationsStatusEnum.ERROR,
+                    description=f"File {upload_file.filename} already exists in storage.",
+                ),
+            )
             raise HTTPException(
                 status_code=403,
                 detail=f"File {upload_file.filename} already exists in storage.",
             )
+        
         else:
+            notification_service.update_notification_by_id(
+                notification_id,
+                NotificationUpdatableProperties(
+                    status=NotificationsStatusEnum.ERROR,
+                    description=f"There was an error uploading the file",
+                ),
+            )
             raise HTTPException(
                 status_code=500, detail=f"Failed to upload file to storage. {e}"
             )

backend/api/quivr_api/modules/upload/controller/upload_routes.py

@@ -82,19 +82,27 @@ async def upload_file(
     except Exception as e:
         print(e)
 
-        notification_service.update_notification_by_id(
-            upload_notification.id if upload_notification else None,
-            NotificationUpdatableProperties(
-                status=NotificationsStatusEnum.ERROR,
-                description=f"There was an error uploading the file: {e}",
-            ),
-        )
+
         if "The resource already exists" in str(e):
+            notification_service.update_notification_by_id(
+                upload_notification.id if upload_notification else None,
+                NotificationUpdatableProperties(
+                    status=NotificationsStatusEnum.ERROR,
+                    description=f"File {uploadFile.filename} already exists in storage.",
+                ),
+            )
             raise HTTPException(
                 status_code=403,
                 detail=f"File {uploadFile.filename} already exists in storage.",
             )
         else:
+            notification_service.update_notification_by_id(
+                upload_notification.id if upload_notification else None,
+                NotificationUpdatableProperties(
+                    status=NotificationsStatusEnum.ERROR,
+                    description=f"There was an error uploading the file",
+                ),
+            )
             raise HTTPException(
                 status_code=500, detail=f"Failed to upload file to storage. {e}"
             )