* feat(pages): add admin pages mini-CMS with public rendering Add a complete CMS system for admin-managed static pages (privacy policy, terms of service, about, rules, etc.) replacing the hardcoded /legal/* routes. Backend changes: - New `pages` table with hierarchy (parentId), status (draft/published), markdown content, SEO meta description, and tenant isolation via RLS - Zod validation with reserved slug rejection (new, edit, drafts) - Full CRUD API: public endpoints (GET /api/pages, GET /api/pages/:slug) serve only published pages; admin endpoints handle drafts and tree management - Cycle detection prevents circular parent references - Setup service seeds 3 default pages (Terms, Privacy, Cookie Policy) with full markdown content during community initialization - Migration 0004_add_pages_table with proper journal chain Closes barazo-forum/barazo-workspace#TBD * fix(pages): resolve ESLint errors in routes and tests