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

api/tasks/clean_document_task.py

@@ -3,6 +3,7 @@ import time
 
 import click
 from celery import shared_task
+
 from core.index.index import IndexBuilder
 from extensions.ext_database import db
 from models.dataset import Dataset, DocumentSegment