feat: Deprecate datetime.utcnow() in favor of datetime.now(timezone.utc).replace(tzinfo=None) for better timezone handling (#3408) (#3416)

api/tasks/document_indexing_sync_task.py

@@ -67,7 +67,7 @@ def document_indexing_sync_task(dataset_id: str, document_id: str):
         # check the page is updated
         if last_edited_time != page_edited_time:
             document.indexing_status = 'parsing'
-            document.processing_started_at = datetime.datetime.utcnow()
+            document.processing_started_at = datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
             db.session.commit()
 
             # delete all document segment and index