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

api/tasks/annotation/enable_annotation_reply_task.py

@@ -4,15 +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 Dataset
-from models.model import MessageAnnotation, App, AppAnnotationSetting
+from models.model import App, AppAnnotationSetting, MessageAnnotation
 from services.dataset_service import DatasetCollectionBindingService
+from werkzeug.exceptions import NotFound
 
 
 @shared_task(queue='dataset')