feat: 工具配置增强、站点拨测与日志中心多项改进

- 工具配置：新增卸载 API/UI、Go 工具链、流水线构建自动安装依赖
- 修复 ListTools VerifyTool 递归栈溢出导致获取工具配置失败
- Node.js Alpine 安装改用 unofficial-builds musl 预编译包与 index.json 解析 LTS
- 站点拨测：详情页路由、告警自动恢复、并发拨测与默认可观测频率
- 日志中心：RBAC、查询构建器、ES/Loki 增强与审计 request/response 展示
- 发布配置：构建节点、流水线远程执行、Deploy RBAC 导航拆分

backend/pkg/siteprobe/worker.go

@@ -67,15 +67,22 @@ func (w *Worker) runOnce() {
 	var tasks []model.SiteTask
 	w.db.Where("status = ?", model.SiteTaskStatusRunning).Find(&tasks)
 	now := time.Now()
+	sem := make(chan struct{}, 8) // 最多 8 路并发拨测，避免串行阻塞 // Logan.Li
+	var wg sync.WaitGroup
 	for _, task := range tasks {
-		if task.Frequency <= 0 {
-			task.Frequency = 60
-		}
+		task.Frequency = NormalizeProbeFrequency(string(task.TaskType), task.Frequency)
 		if task.LastCheckAt != nil && now.Sub(*task.LastCheckAt) < time.Duration(task.Frequency)*time.Second {
 			continue
 		}
-		w.probeTask(task)
+		wg.Add(1)
+		go func(t model.SiteTask) {
+			defer wg.Done()
+			sem <- struct{}{}
+			defer func() { <-sem }()
+			w.probeTask(t)
+		}(task)
 	}
+	wg.Wait()
 }
 
 func (w *Worker) probeTask(task model.SiteTask) {
@@ -110,9 +117,11 @@ func (w *Worker) probeTask(task model.SiteTask) {
 		avg = (task.AvgResponse + outcome.ResponseTime) / 2
 	}
 	w.db.Model(&model.SiteTask{}).Where("id = ?", task.ID).Updates(map[string]interface{}{
-		"task_type":    task.TaskType,
-		"last_result":  lastResult,
+		"task_type":     task.TaskType,
+		"last_result":   lastResult,
 		"last_check_at": now,
-		"avg_response": avg,
+		"avg_response":  avg,
 	})
+	// 拨测恢复后即时关闭探测类告警，与统计栏 down_count 同步 // Logan.Li
+	ResolveRecoveredProbeAlerts(w.db, task.ID, lastResult)
 }