feat(alert-center): 添加飞书Webhook通知渠道 + 告警引擎实时通知

- 后端: NotifyChannel 模型新增 feishu 类型, FeishuWebhookConfig
- 后端: TestNotifyChannel 真实发送飞书测试消息(文本格式)
- 后端: 告警引擎触发/恢复时自动发送飞书通知(sendFeishuAlert/sendFeishuRecovery)
- 后端: AlertEngine 新增 tcp_time_wait/tcp_close_wait/service_process 指标检测
- 后端: NetworkStatModel 新增 TCPCloseWait 字段
- 后端: QuickSetupRules 一键创建6条告警规则(CPU/内存/磁盘/TIME_WAIT/CLOSE_WAIT/进程)
- 后端: 注册 /alerts/quick-setup 路由
- 前端: AlertChannelDialog 新增飞书类型选项
- 前端: helpers 新增 getChannelIcon/getChannelTypeLabel 支持 feishu/dingtalk/wechat

frontend/src/components/deploy/releaseHelpers.tsx

@@ -87,6 +87,6 @@ export const PIPELINE_STEPS = [
   { name: '单元测试', status: 'success', duration: '2m 15s' },
   { name: '构建镜像', status: 'success', duration: '3m 30s' },
   { name: '推送镜像', status: 'success', duration: '1m 20s' },
-  { name: '部署到K8s', status: 'running', duration: '--' },
+  { name: '部署到Kubernetes', status: 'running', duration: '--' },
   { name: '健康检查', status: 'pending', duration: '--' },
 ];