禁用除新订单服务号广播外的所有 Celery/Beat 任务，仅保留 dingdan_guangbo

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

utils/chat_utils.py

@@ -850,6 +850,8 @@ STATUS_NOTIFY_TEXT = {
 
 def schedule_order_status_chat_push(dingdan_id):
     """订单状态变更后，事务提交后异步推送群聊状态更新"""
+    if getattr(settings, 'CELERY_ONLY_ORDER_BROADCAST', True):
+        return
     if not dingdan_id:
         return