fix: 成交指标始终记账并回填；抢单建聊移出事务并重试

抢单池刷新触发历史回填，旧单也能出成交率/罚款率/均时；建聊失败重试并订阅组队成员，避免消息列表空白。

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

orders/views/dashou.py

@@ -507,8 +507,15 @@ class QiangdanView(APIView):
                     return Response({'code': 400, 'msg': validation_result['message']})
                 self._execute_qiangdan(order, dashou_profile, request.user.UserUID)
 
-                # ========== 【唯一改动】聊天建立方式 ==========
+            # 建聊必须在事务提交后：GoEasy HTTP 不可放在行锁事务里，失败也不回滚抢单
+            chat_success = False
+            try:
                 chat_success = establish_order_chat(dingdan_id)
+                if not chat_success:
+                    # 再试一次，避免偶发订阅/发消息失败导致消息列表空白
+                    chat_success = establish_order_chat(dingdan_id)
+            except Exception as e:
+                logger.error(f"抢单后建立聊天失败 dingdan={dingdan_id}: {e}", exc_info=True)
 
             try:
                 update_dashou_daily_by_action(