enhancement: introduce Ruff for Python linter for reordering and removing unused imports with automated pre-commit and sytle check (#2366)

api/tasks/add_document_to_index_task.py

@@ -4,13 +4,14 @@ import time
 
 import click
 from celery import shared_task
+from langchain.schema import Document
+from werkzeug.exceptions import NotFound
+
 from core.index.index import IndexBuilder
 from extensions.ext_database import db
 from extensions.ext_redis import redis_client
-from langchain.schema import Document
 from models.dataset import Document as DatasetDocument
 from models.dataset import DocumentSegment
-from werkzeug.exceptions import NotFound
 
 
 @shared_task(queue='dataset')