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>

dingdan/signals.py

@@ -61,8 +61,22 @@ ensure_redis_loaded()
 @receiver(pre_save, sender='dingdan.Dingdan')
 def handle_order_status_8(sender, instance, **kwargs):
     """
-    订单状态变为8时，提交定时任务
+    订单状态变为8时，提交定时任务（已禁用：仅保留新订单广播）
     """
+    if getattr(settings, 'CELERY_ONLY_ORDER_BROADCAST', True):
+        if instance.pk is None:
+            return
+        try:
+            from dingdan.models import Dingdan
+            old = Dingdan.objects.filter(pk=instance.pk).values_list('zhuangtai', flat=True).first()
+            if old == 8 and instance.zhuangtai != 8:
+                instance.status_8_time = None
+                instance.pending_dispatch = False
+                instance.auto_task_id = ''
+        except Exception as e:
+            logger.error(f"信号处理失败: {e}")
+        return
+
     # 跳过新增的订单
     if instance.pk is None:
         return