diff --git a/apps/worker/worker_app/tasks/_startup.py b/apps/worker/worker_app/tasks/_startup.py
index df2047cb4..47b0b3a76 100644
--- a/apps/worker/worker_app/tasks/_startup.py
+++ b/apps/worker/worker_app/tasks/_startup.py
@@ -334,4 +334,3 @@ def _recover_stuck_voice_clones_on_ready(sender, **kwargs):
         logger.info("Worker 启动音色克隆恢复完成，共标记 %d 个卡死任务为 failed", recovered)
     except Exception as e:
         logger.error("启动音色克隆恢复失败（beat 巡检仍会兜底标 failed）: %s", e, exc_info=True)
-
diff --git a/apps/worker/worker_app/tasks/cleanup.py b/apps/worker/worker_app/tasks/cleanup.py
index 91991635d..c4116c2d2 100644
--- a/apps/worker/worker_app/tasks/cleanup.py
+++ b/apps/worker/worker_app/tasks/cleanup.py
@@ -166,4 +166,3 @@ def scheduled_cleanup_stale_voice_clones(
     finally:
         if session is not None:
             session.close()
-
diff --git a/packages/adapters/sqlalchemy_impl/voice_clone_profile_repository.py b/packages/adapters/sqlalchemy_impl/voice_clone_profile_repository.py
index 8ad36e4a8..827f09d12 100644
--- a/packages/adapters/sqlalchemy_impl/voice_clone_profile_repository.py
+++ b/packages/adapters/sqlalchemy_impl/voice_clone_profile_repository.py
@@ -149,7 +149,7 @@ class SQLAlchemyVoiceCloneProfileRepository:
         Returns:
             清理的记录数
         """
-        from datetime import datetime, timedelta, UTC
+        from datetime import UTC, datetime, timedelta
 
         cutoff = datetime.now(UTC) - timedelta(minutes=timeout_minutes)
         models = (