feat: 监控告警体系统一重构 + 自动化任务调度引擎 + 监控大屏拆分

告警中心
- 新增统一告警(alert_unified)、监控告警规则(monitor_alert_rule)、指标目录(alert_metric_catalog)
- 通知策略与消息分发(alert_notify_policy/dispatch/message)、静默规则
- 告警引擎按阈值/SNMP 拆分(alert_engine_monitor/snmp)

监控采集
- SNMP 常量/模板与历史指标(snmp templates/constants、snmp_metrics_history、snmp_collect)
- 中间件监控 Redis 采集与种子(middleware_monitor_redis/seed)
- 站点探测 pkg(siteprobe) + 站点视图(site_view)

自动化任务
- cron 调度器(cronscheduler)、脚本运行器(scriptrunner)、系统任务(systask)及运行记录(cron_job_run、system_task)

审计与凭证
- 审计设置(audit_setting) + 历史清理(auditcleaner)

前端
- 监控页面(host/middleware/site/snmp)拆分为子模块并大屏化
- 告警中心多 Tab(规则/指标目录/通知策略/静默)、任务管理组件重构、Agent CLI Markdown 渲染
- 移除旧脚本卡片/详情/日志组件，统一为 ScriptTable/ScriptCodeEditor/TerminalOutput

Co-Authored-By: Claude <noreply@anthropic.com>

backend/controller/automation.go

@@ -1,14 +1,13 @@
 package controller
 
 import (
-	"bytes"
-	"context"
 	"crypto/rand"
 	"encoding/hex"
 	"fmt"
-	"os/exec"
 	"time"
 
+	"ezops/pkg/scriptrunner"
+
 	"gorm.io/gorm"
 )
 
@@ -21,48 +20,10 @@ func randomCode(prefix string) string {
 	return fmt.Sprintf("%s-%d-%s", prefix, time.Now().Unix(), hex.EncodeToString(b))
 }
 
-// runLocal executes a script or shell command locally on the AIOps host and
-// returns the combined stdout+stderr output, the process exit code (0 = success)
-// and the wall-clock duration in milliseconds. A timeout prevents runaway jobs.
+// runLocal 委托 scriptrunner 在本机执行脚本（含运行时预检） // Logan.Li
 func runLocal(scriptType, content string, timeoutSec int) (output string, exitCode int, durationMs int) {
-	start := time.Now()
-	timeout := time.Duration(timeoutSec) * time.Second
-	if timeout <= 0 {
-		timeout = 300 * time.Second
-	}
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
-	defer cancel()
-
-	var cmd *exec.Cmd
-	switch scriptType {
-	case "python":
-		cmd = exec.CommandContext(ctx, "python3", "-c", content)
-	default: // shell / command / "" → run via bash
-		cmd = exec.CommandContext(ctx, "bash", "-c", content)
-	}
-
-	var out bytes.Buffer
-	cmd.Stdout = &out
-	cmd.Stderr = &out
-
-	err := cmd.Run()
-	durationMs = int(time.Since(start).Milliseconds())
-	output = out.String()
-
-	if ctx.Err() == context.DeadlineExceeded {
-		output += fmt.Sprintf("\n[超时] 执行超过 %d 秒被终止", timeoutSec)
-		return output, -1, durationMs
-	}
-	if err != nil {
-		if exitError, ok := err.(*exec.ExitError); ok {
-			exitCode = exitError.ExitCode()
-		} else {
-			exitCode = -1
-			output += "\n" + err.Error()
-		}
-		return output, exitCode, durationMs
-	}
-	return output, 0, durationMs
+	output, exitCode, durationMs, _ = scriptrunner.Run(scriptType, content, timeoutSec)
+	return output, exitCode, durationMs
 }
 
 // AutomationHandler 自动化运维处理器