feat: mypy for all type check (#10921)

api/tasks/clean_document_task.py

@@ -3,7 +3,7 @@ import time
 from typing import Optional
 
 import click
-from celery import shared_task
+from celery import shared_task  # type: ignore
 
 from core.rag.index_processor.index_processor_factory import IndexProcessorFactory
 from core.tools.utils.web_reader_tool import get_image_upload_file_ids
@@ -44,6 +44,8 @@ def clean_document_task(document_id: str, dataset_id: str, doc_form: str, file_i
                 image_upload_file_ids = get_image_upload_file_ids(segment.content)
                 for upload_file_id in image_upload_file_ids:
                     image_file = db.session.query(UploadFile).filter(UploadFile.id == upload_file_id).first()
+                    if image_file is None:
+                        continue
                     try:
                         storage.delete(image_file.key)
                     except Exception: