mir-backend-php-symfony

Make It Right (Symfony module). Symfony 6/7 + Doctrine ORM + PostgreSQL/MySQL + Messenger + API Platform specific reliability augmentation. Use alongside mir-backend and mir-backend-php when the target stack is Symfony — it carries the mechanical footguns that the framework-agnostic tiers deliberately omit: Doctrine N+1 via lazy proxies, Unit of Work memory exhaustion in batch loops, EntityManager becoming closed/stale after an exception, service container singleton semantics and request-state bleed, Serializer group discipline to avoid data leaks, Messenger for async/queued work with idempotent handlers, Validator on DTOs, and explicit flush boundaries. TRIGGER only when the PHP backend stack is Symfony — building, reviewing, or debugging a Symfony controller, Doctrine entity/repository, Messenger handler, migration, or service. Always loads TOGETHER WITH mir-backend (the gates) and mir-backend-php (Zend Engine runtime concerns: shared-nothing lifecycle, FPM worker model, persistent-runtime state bleed, opcache, error model); this module only adds Symfony/Doctrine library mechanics. SKIP for Laravel, WordPress, Slim, or any non-Symfony PHP stack (those get their own mir-backend-php-<framework> module), and for non-PHP runtimes.