Split monolithic CLAUDE.md into per-service sub-files
Root CLAUDE.md now contains only project-wide concerns (stack, architecture,
Docker, workflows, security hook). Service-specific details moved to:
- backend/CLAUDE.md — DB models, API endpoints, JWT/bcrypt, naming conventions
- frontend/CLAUDE.md — routes, TanStack Query patterns, XSS prevention
- features/ai-service/CLAUDE.md — queue endpoints, provider notes
- features/doc-service/CLAUDE.md — document models, PDF limits, proxy endpoints
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>