chore: 统一本地服务器与远程仓库源码

- 合并 main 与 master 历史并以服务器结构为基线
- 保留迁移、数据保留、AWS 账单与部署安全能力
- 建立 SDD 规格和 CI 验证闭环

backend/pkg/systask/registry.go

@@ -45,32 +45,27 @@ var (
 		{
 			Code: "alert_engine", Name: "告警引擎扫描",
 			Description: "扫描 Agent 指标阈值、主机离线、端口策略与日志告警规则，触发通知与自动恢复",
-			Schedule: "每 30 秒", Category: "monitor", Runnable: false, Enabled: true,
+			Schedule:    "每 30 秒", Category: "monitor", Runnable: false, Enabled: true,
 		},
 		{
 			Code: "middleware_monitor", Name: "中间件监控采集",
 			Description: "直连 Redis/MySQL 等中间件目标采集指标并写入监控库",
-			Schedule: "每 30 秒", Category: "monitor", Runnable: false, Enabled: true,
+			Schedule:    "每 30 秒", Category: "monitor", Runnable: false, Enabled: true,
 		},
 		{
-			Code: "agent_report_cleanup", Name: "Agent 上报清理",
-			Description: "清理 7 天前的 Agent 指标上报原始数据，防止表膨胀",
-			Schedule: "每 24 小时", Category: "cleanup", Runnable: true, Enabled: true,
+			Code: "retention_cleanup", Name: "高频数据保留清理",
+			Description: "按保留策略分批清理 Agent、指标、SNMP、站点拨测和日志数据，并记录受影响行数",
+			Schedule:    "每 24 小时", Category: "cleanup", Runnable: true, Enabled: true,
 		},
 		{
 			Code: "audit_log_cleanup", Name: "审计日志清理",
 			Description: "按系统设置中的保留天数清理操作审计、登录日志、终端会话与命令记录",
-			Schedule: "每 24 小时", Category: "cleanup", Runnable: true, Enabled: true,
-		},
-		{
-			Code: "snmp_metrics_cleanup", Name: "SNMP 指标清理",
-			Description: "清理 7 天前的 SNMP 采集指标历史，防止表膨胀",
-			Schedule: "每 24 小时", Category: "cleanup", Runnable: true, Enabled: true,
+			Schedule:    "每 24 小时", Category: "cleanup", Runnable: true, Enabled: true,
 		},
 		{
 			Code: "cloud_billing_sync", Name: "云账单同步",
-			Description: "从云账号 AK 拉取昨日账单（按产品+地域），写入云账单管理；当前支持阿里云",
-			Schedule: "每天 10:30", Category: "finops", Runnable: true, Enabled: true,
+			Description: "从云账号 AK 拉取昨日账单（按产品+地域），写入云账单管理；当前支持阿里云和腾讯云", // Logan.Li
+			Schedule:    "每天 10:30", Category: "finops", Runnable: true, Enabled: true,
 		},
 	}
 )
@@ -237,4 +232,4 @@ func findDef(code string) (Def, bool) {
 		}
 	}
 	return Def{}, false
-}
+}