落地系统异常：大模型/TMS/建群故障停住本单并告警，后台可重试失败步骤。

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

inquiry-agent/agent/handlers/group_collab.py

@@ -100,6 +100,15 @@ def handle_group_inbound(
         logger.info("group_inbound 忽略非成员 sender=%s chat=%s", message.sender_id, chat_id)
         return "group_ignore"
 
+    from agent.policy.system_exception import reply_paused_ticket, ticket_is_paused
+
+    if ticket_is_paused(ticket):
+        reply_paused_ticket(
+            ticket=ticket,
+            reply=lambda text: send_group_text(group_client_of(engine), chat_id, text),
+        )
+        return "system_exception_paused"
+
     sess = _session_of_ticket(engine, ticket)
     if is_handoff_ticket(ticket, sess):
         logger.info(