- Rename CLI binary from blueprint to modux (php modux <command>)
- Update composer.json: name → cynchro/modux, add bin entry
- Update CLAUDE.md and README.md with Modux branding
- Add README.md to backend/src/ for Packagist visibility
- Refactor module structure: remove legacy helpers, requests, filters
- Add Support/Container, Router, Kernel, Pipeline, FormRequest, Validator
- Add typed exception hierarchy with global JSON handler
- Add middleware pipeline: Auth, Admin, CORS, Security, RequestLogger, Tenant
- Add PSR-3 structured logger and PSR-11 DI container

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