feat(page-data): complete Phase 4-5, ops UI, and publish integration

Add visitor roles, row-level scope, owner ops APIs, MySQL policy index,
Turnstile captcha, browser client SDK, publish-panel dataset binding,
acceptance tests, and usage documentation.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/architecture/page-data-api-public-access-plan-20260708.md

@@ -2,7 +2,7 @@
 
 日期: 2026-07-08
 
-状态: Draft，仅开发设计；本文不代表已实现。
+状态: 已实现（Phase 1–5 + 产品层）；以代码与 `docs/page-data-api-usage.md` 为准。
 
 ## 1. 背景