sync: malware page, security alerts, review diagnostics, skill detail improvements

- Add malware security advisory page and SecurityAlertBanner component
- Add review diagnostics API and reviewed stats page
- Improve skill detail page with better scoring display and metadata
- Update review API endpoints with enhanced filtering and stats
- Add skill file serving improvements and cache enhancements
- Remove legacy curation scripts (moved to internal tooling)
- Update CLI search with score filtering support

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/components/Header.tsx

@@ -21,6 +21,7 @@ export function Header() {
     { name: t('home'), href: `/${locale}` },
     { name: t('browse'), href: `/${locale}/browse` },
     { name: t('categories'), href: `/${locale}/categories` },
+    { name: t('reviewed'), href: `/${locale}/reviewed` },
     { name: t('docs'), href: `/${locale}/docs` },
   ];