fix(alarm): 添加intrusion_cleared自动关闭处理

- resolve_alarm方法支持intrusion_cleared类型
- 自动标记为CLOSED状态，备注"入侵消失自动关闭（持续无人180秒）"
- 与person_returned和non_work_time保持一致

app/services/alarm_event_service.py

@@ -570,6 +570,11 @@ class AlarmEventService:
                 alarm.handle_status = "DONE"
                 alarm.handle_remark = "非工作时间自动关闭"
                 alarm.handled_at = datetime.now(timezone.utc)
+            elif resolve_type == "intrusion_cleared":
+                alarm.alarm_status = "CLOSED"
+                alarm.handle_status = "DONE"
+                alarm.handle_remark = "入侵消失自动关闭（持续无人180秒）"
+                alarm.handled_at = datetime.now(timezone.utc)
 
             alarm.updated_at = datetime.now(timezone.utc)
             db.commit()