feat: 模块化命令框架 + runbook 严格断言与查询结果回传

- core/module: 命令模板、门控（feature flag/confirm/dry-run）、ecode 错误标签、ResultFormatter
- runbook executor: http.get/http.post/assert.json(expect_success 严格断言)、目标主机管理、任务落库、最终 stdout 直接回传
- cf 模块: /cf dns list 支持域名自动解析 zone_id；dns list/zones/workers list 格式化回传；API success:false 判真失败
- 全部 CF/CPA runbook 接入严格断言，杜绝假阳性 success
- 新增 cpa/cfdav/mail/sub 模块与 runbooks；QQ 订阅到期提醒调度
- Web 后台: 模块设置(CF/CPA/cfdav/AI)、OPS 任务、渠道管理、审计页

internal/core/ops/run_once.go

@@ -0,0 +1,20 @@
+package ops
+
+import (
+	"path/filepath"
+
+	"ops-assistant/internal/core/runbook"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+// RunOnce executes a runbook directly without bot/channel.
+func RunOnce(dbPath, baseDir, commandText, runbookName string, operator int64, inputs map[string]string) (uint, string, error) {
+	db, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
+	if err != nil {
+		return 0, "", err
+	}
+	exec := runbook.NewExecutor(db, filepath.Join(baseDir, "runbooks"))
+	return exec.RunWithInputsAndMeta(commandText, runbookName, operator, inputs, runbook.NewMeta())
+}