feat: Track 打通已完成/已入库/已出库状态闭环与外部联动

- 完工转交入库同步 status=COMPLETED;MOM 入库/出库回调同步 status
- 新增 mom-outbound webhook(发货出库标记已出库),lookup 返回 material_id
- VALID_OVERALL_STATUS 新增已出库;update_overall_status 同步 status 字段
- WIP 矩阵区分已入库/待仓库收货;虚拟节点正确处理已出库/转入在库人

backend/app/services/task_service.py

@@ -845,7 +845,9 @@ async def transfer_task(
     if product:
         if has_warehouse and not real_branches:
             product.current_location_id = VIRTUAL_WAREHOUSE
-            product.overall_status = "在库"
+            product.overall_status = "待仓库收货"
+            # 双字段同步：完工转交入库 → 产品标记为已完成（MOM 扫码实收后才变已入库）
+            product.status = "COMPLETED"
         elif real_branches:
             product.current_location_id = real_branches[0][1]
             if not task.parent_task_id or task.task_type in ("TRANSFER", "RECOVERY"):