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

api/tasks/clean_dataset_task.py

@@ -3,12 +3,17 @@ import time
 
 import click
 from celery import shared_task
+
 from core.index.index import IndexBuilder
-from core.index.vector_index.vector_index import VectorIndex
 from extensions.ext_database import db
-from flask import current_app
-from models.dataset import (AppDatasetJoin, Dataset, DatasetKeywordTable, DatasetProcessRule, DatasetQuery, Document,
-                            DocumentSegment)
+from models.dataset import (
+    AppDatasetJoin,
+    Dataset,
+    DatasetProcessRule,
+    DatasetQuery,
+    Document,
+    DocumentSegment,
+)
 
 
 @shared_task(queue='dataset')