style(backend): ruff format 统一此前批次的排版残留

纯排版无行为变化（ruff format 重排 7 个此前批次的文件），
涉及模块集成回归全绿（67 passed）。

Co-Authored-By: Claude Code <noreply@anthropic.com>

backend/app/api/v1/business/shipments.py

@@ -50,9 +50,7 @@ def create_shipment(
     )
 
 
-@router.get(
-    "/{shipment_id}", response_model=ApiResponse[ShipmentDetailOut], summary="发货单详情"
-)
+@router.get("/{shipment_id}", response_model=ApiResponse[ShipmentDetailOut], summary="发货单详情")
 def get_shipment(
     session: DbSession,
     _: CurrentUser,