新增 affiliate_dash 履约 executor(阶段 2)

- executor 常量/守卫 + affiliate-dash-executor(preparePaidTask/resolveDeliveryLink)
- 履约业务实现:prepareAffiliateDashTask(幂等建单, client_order_no=task_no, data 透传 91单号/game_account)
  + syncAffiliateDashTaskStatus(状态合并: delivering→redeeming / delivered→核销→redeemed /
  ship_failed→retry_pending / cancelled→closed)
- registry 注册 + 测试(212 全绿)
- 真实建单联调通过(线上 skin.khhao.com,幂等不重复扣款)
- 修复 POST /orders 响应 data.order 映射层级

apps/backend/src/services/platforms/affiliate-dash/order-service.ts

@@ -2,7 +2,10 @@ import type { JsonObject } from '../../../types/json.js'
 
 import { affiliateDashRequest } from './http-client.js'
 
-export type AffiliateDashOrder = ReturnType<typeof mapAffiliateDashOrder>
+export type AffiliateDashOrder = ReturnType<typeof mapAffiliateDashOrder> & {
+  /** 命中幂等（200 + idempotent=true）时为 true，仅创建订单响应存在 */
+  idempotent?: boolean
+}
 export type AffiliateDashDeliveryInfo = ReturnType<typeof mapAffiliateDashDeliveryInfo>
 export type AffiliateDashBindResult = ReturnType<typeof mapAffiliateDashBindResult>
 export type AffiliateDashWallet = ReturnType<typeof mapAffiliateDashWallet>
@@ -35,7 +38,12 @@ export async function createAffiliateDashOrder(input: {
     pathname: ORDERS_PATH,
     payload,
   })
-  return mapAffiliateDashOrder(json.data)
+  const data = asJsonObject(json.data)
+  const order = mapAffiliateDashOrder(data.order)
+  return {
+    ...order,
+    idempotent: Boolean(data.idempotent),
+  }
 }
 
 export async function getAffiliateDashOrder(orderNo: string) {
@@ -137,6 +145,7 @@ export function mapAffiliateDashOrder(value: unknown) {
     createdAt: asString(source.created_at),
     deliveredAt: asString(source.delivered_at),
     cancelledAt: asString(source.cancelled_at),
+    raw: isJsonObject(source) ? source : {},
   }
 }