Backend changes cherry-picked from ui-rewrite branch to enable
feedback API endpoints for the Next.js staging UI.
- chair_feedback DB table + API endpoints (GET/POST/PATCH)
- Content checklists by appeal subtype injected into block-yod prompt
- MCP tools for recording and listing chair feedback
- Corpus analysis documentation (24 decisions)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>