- Symfony 8.1, DoctrineBundle 3.3, API Platform 5.0, monolog-bundle 4,
  geocoder-bundle 6, doctrine-fixtures-bundle 4, PHPMD 3.
- Removed Symfony aliases: Routing\Attribute\Route and
  Serializer\Attribute\Groups/MaxDepth instead of the Annotation ones (the
  routes and the serialization groups were silently ignored).
  AttributeClassesTest checks that every attribute class exists.
- Attribute routes loaded with their namespace (PSR-4 loader).
- SonataFormatterBundle removed (no Symfony 8.1 support): FOSCKEditorBundle
  required directly, CKEditor media browser and upload ported
  (App\Admin\CkeditorAdminExtension, CkeditorAdminController), with
  CkeditorMediaTest.
- cron/cron-bundle removed (its cron/cron library does not support
  Symfony 8; the crons call the kohinos:* commands); its tables are kept.
- monolog: excluded_http_codes instead of excluded_404s; dead EasyLog
  handler configuration removed.
- composer audit.block-insecure enabled again; unused abandoned packages
  removed (package-versions-deprecated, deployer/recipes).