sync: stale skill detection, sentry filtering, claim removal, review improvements

Stale Detection:
- Detect skills removed/moved from GitHub (3 consecutive 404s threshold)
- Hide stale skills from browse/search, show warning banner on detail page
- Serve cached files with isStale flag when GitHub returns 404
- Add stale-check crawler command for batch verification
- CLI shows warning when installing stale skills from cache

Sentry & Error Handling:
- Filter browser extension errors and add denyUrls
- Anti-inflation measures and sentinel recalibration for curation

Claim & Removal:
- Enhanced ClaimForm with repo-level removal support
- Add repo-removal-request API endpoint with tests
- Improved owner page with bilingual content

Review Pipeline:
- Review version and reviewer tracking in submit API
- Source format filter for pending reviews
- Updated review tests

Other:
- Updated i18n strings (en/fa)
- BrowseFilters improvements
- Dockerfile updates

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/sentry.client.config.ts

@@ -43,6 +43,20 @@ Sentry.init({
     /Object Not Found Matching Id/,
     // ResizeObserver loop limit — browser quirk, not actionable
     "ResizeObserver",
+    // DOM manipulation by browser extensions (translate, font, etc.) conflicts with React
+    "NotFoundError: Failed to execute 'removeChild' on 'Node'",
+    "NotFoundError: Failed to execute 'insertBefore' on 'Node'",
+    // Browser extension internal errors (crypto wallets, etc.)
+    /func .* not found/,
+  ],
+
+  // Ignore errors originating from browser extensions or injected scripts
+  denyUrls: [
+    /extensions\//i,
+    /^chrome:\/\//i,
+    /^chrome-extension:\/\//i,
+    /^moz-extension:\/\//i,
+    /inpage\.js/,
   ],
 
   beforeSend(event, hint) {