Add #[AsDatabaseType] attribute to register DBAL types as Symfony services

[GromNaN]

Introduces the #[AsDatabaseType] PHP attribute and a DatabaseTypePass compiler pass to register Doctrine DBAL types as Symfony services with a per-connection TypeRegistry, without touching the global static type registry.

How it works

• A new #[AsDatabaseType(name: 'money')] attribute tags the service with doctrine.dbal.type
• DatabaseTypePass builds a TypeRegistry per connection, populated with:
  • Config-based types (doctrine.dbal.types) as inline definitions
  • Service-tagged types as service references
• The TypeRegistry is wired to both the DBAL Configuration and the ORM Configuration of each associated entity manager
• Types can be restricted to specific connections by repeating the attribute: #[AsDatabaseType(name: 'money', connection: 'reporting')]

Example

use Doctrine\Bundle\DoctrineBundle\Attribute\AsDatabaseType;
use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Types\Type;

#[AsDatabaseType(name: MoneyType::NAME)]
final class MoneyType extends Type
{
    public const string NAME = 'money';

    public function getSQLDeclaration(array $column, AbstractPlatform $platform): string
    {
        return $platform->getDecimalTypeDeclarationSQL($column);
    }
}

#[ORM\Column(type: MoneyType::NAME)]
private Money $price;

Dependencies

This PR depends on changes in DBAL and ORM to support per-connection TypeRegistry:

• Add TypeRegistry to Configuration and use it in all internal type resolution dbal#7342
• Replace static Type::* calls with instance-based TypeRegistry lookups orm#12421

Demo

A working example using #[AsDatabaseType] to store emails as base64 in the database is available at: https://github.com/GromNaN/symfony-demo/tree/doctrine-type-service