修复：resolve_alarm 添加 vehicle_left 和 congestion_cleared 状态处理

违停车辆离开和拥堵消散的 resolve 事件没有匹配到对应的状态分支，
导致告警只更新了 duration_ms 但 alarm_status 没改为 CLOSED。

app/services/alarm_event_service.py

@@ -870,6 +870,16 @@ class AlarmEventService:
                 alarm.handle_status = "DONE"
                 alarm.handle_remark = "入侵消失自动关闭（持续无人180秒）"
                 alarm.handled_at = beijing_now()
+            elif resolve_type == "vehicle_left":
+                alarm.alarm_status = "CLOSED"
+                alarm.handle_status = "DONE"
+                alarm.handle_remark = "车辆离开自动关闭"
+                alarm.handled_at = beijing_now()
+            elif resolve_type == "congestion_cleared":
+                alarm.alarm_status = "CLOSED"
+                alarm.handle_status = "DONE"
+                alarm.handle_remark = "拥堵消散自动关闭"
+                alarm.handled_at = beijing_now()
 
             alarm.updated_at = beijing_now()
             db.commit()