improve: introduce isort for linting Python imports (#1983)

api/tasks/disable_segment_from_index_task.py

@@ -3,12 +3,11 @@ import time
 
 import click
 from celery import shared_task
-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 models.dataset import DocumentSegment
+from werkzeug.exceptions import NotFound
 
 
 @shared_task(queue='dataset')