Draft:[#30118 fidis:core] build(dependencies): upgrade Symfony API stack
- upgrade PHP, Symfony, API Platform, Doctrine, JWT and Composer dependencies
- migrate security, serializer and API Platform integrations to current APIs
- add database migration and preserve existing user and order behavior
- add Codeception HTTP and unit tests with enforced 100% API runtime coverage
- update Docker images, OpenAPI schemas and framework documentation
Refs: #30118 Context: fidis:core