feat(trade): complete order on courier signed callback (v3.4.13)

When XFX route callback reports status=5 or statusName containing 签收, map to COMPLETED instead of PENDING_RECEIVE; document in v3.4.13 docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/integrations/courier/xiaofeixia/xiaofeixia.provider.ts

@@ -157,7 +157,11 @@ export class XiaofeixiaProvider implements ICourierProvider {
     };
   }
 
-  mapTrackStatus(status: string): CourierMappedOrderStatus | null {
+  mapTrackStatus(status: string, statusName?: string): CourierMappedOrderStatus | null {
+    const name = (statusName || '').trim();
+    if (status === '5' || /签收/.test(name)) {
+      return 'COMPLETED';
+    }
     switch (String(status).trim()) {
       case '1':
         return 'OUT_WAREHOUSE';
@@ -165,8 +169,6 @@ export class XiaofeixiaProvider implements ICourierProvider {
       case '3':
       case '4':
         return 'SHIPPING';
-      case '5':
-        return 'PENDING_RECEIVE';
       case '7':
         return null;
       default: