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

runbooks/cf_dns_add.yaml

@@ -0,0 +1,18 @@
+version: 1
+name: cf_dns_add
+description: 新增 DNS 记录（按 name/content）
+steps:
+  - id: add_dns
+    action: ssh.exec
+    on_fail: stop
+    with:
+      target: hwsg
+      command: "CF_ACCOUNT_ID=${env_cf_account_id} CF_API_TOKEN=${env_cf_api_token} INPUT_NAME=${env.INPUT_NAME} INPUT_CONTENT=${env.INPUT_CONTENT} INPUT_TYPE=${env.INPUT_TYPE} INPUT_PROXIED=${env.INPUT_PROXIED} python3 -c 'import base64; exec(base64.b64decode(\"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\"), {})'"
+  - id: assert
+    action: assert.json
+    on_fail: stop
+    with:
+      source_step: add_dns
+      expect_success: true
+      required_paths:
+        - "success"