- Symfony 7.2 → 8.1
- API Platform 4.0 → 4.3
- Doctrine DBAL 3 → 4, doctrine-bundle 2 → 3
- PHP 8.4 → 8.5 in Dockerfile
- Fix UserChecker::checkPostAuth signature for Symfony 8.1
- Fix doctrine.yaml: remove deprecated options (use_savepoints, auto_generate_proxy_classes, enable_lazy_ghost_objects, report_fields_where_declared)
- Fix routes/framework.yaml: update errors routing path
- Fix MasInstallCommand: replace removed DBAL isConnected() with executeQuery

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