feat: added some filed to shipment serializers

docs/shipment_delivery.md

@@ -47,6 +47,7 @@
 - `vehicle_capacity`
 - `remark`
 - `internal_remark`
+- `shipment_order_ids`
 - `status`
 - `started_at`
 - `delivered_at`
@@ -67,6 +68,7 @@
 - `merchant` 用于多商户隔离
 - 创建、修改、状态流转时，会根据 `request.user.employee` 自动写入 `operator`
 - 取消送货单时会写入 `cancelled_at` 与 `cancelled_by`
+- `shipment_order_ids` 是前端自管的出货单顺序 JSON 字段；后端只保存和返回，不据此自动排序 `shipments`
 
 ## API 列表
 
@@ -112,6 +114,7 @@ GET /api/v1/shipment/deliveries/?status=2&driver_name=张&vehicle_trip=001&limit
       "vehicle_capacity": "9.6米厢车",
       "remark": "先装车",
       "internal_remark": "注意对账",
+      "shipment_order_ids": [11, 10],
       "status": 1,
       "status_display": "待送货",
       "started_at": null,
@@ -123,6 +126,7 @@ GET /api/v1/shipment/deliveries/?status=2&driver_name=张&vehicle_trip=001&limit
           "id": 10,
           "customer": 5,
           "customer_name": "客户A",
+          "order_description": null,
           "shipment_date": "2026-04-03",
           "status": 2,
           "status_display": "已发布",
@@ -156,6 +160,7 @@ GET /api/v1/shipment/deliveries/?status=2&driver_name=张&vehicle_trip=001&limit
   "vehicle_capacity": "9.6米厢车",
   "remark": "先装车",
   "internal_remark": "注意对账",
+  "shipment_order_ids": [11, 10],
   "shipments": [10, 11]
 }
 ```
@@ -168,6 +173,7 @@ GET /api/v1/shipment/deliveries/?status=2&driver_name=张&vehicle_trip=001&limit
 - `vehicle_capacity`: 可选，车辆容量
 - `remark`: 可选，备注
 - `internal_remark`: 可选，内部备注
+- `shipment_order_ids`: 可选，前端自管的出货单顺序 JSON 数组；可传 `null`；未传时默认 `[]`
 - `shipments`: 可选，出货单 ID 列表
 
 创建规则：
@@ -198,6 +204,7 @@ GET /api/v1/shipment/deliveries/?status=2&driver_name=张&vehicle_trip=001&limit
   "vehicle_capacity": "13米高栏",
   "remark": "改派车辆",
   "internal_remark": "已电话确认",
+  "shipment_order_ids": [11, 12],
   "shipments": [11, 12]
 }
 ```
@@ -205,6 +212,7 @@ GET /api/v1/shipment/deliveries/?status=2&driver_name=张&vehicle_trip=001&limit
 修改规则：
 
 - `driver_name`、`vehicle_trip`、`contact_phone`、`vehicle_capacity`、`remark`、`internal_remark` 可单独修改
+- `shipment_order_ids` 按普通字段处理，后端仅保存与返回；值必须是数组或 `null`
 - `shipments` 如果传入，则视为“整体替换当前绑定的出货单集合”
 - 替换绑定时，出货单仍然必须满足“当前商户、已审核、未绑定到其他送货单”
 - 更新接口不支持直接修改 `status`