Correctly handle leaf inputs that were cast to PHP native enum instances

Describe the bug

Enum passed to validator resulting some dependant rules not working, for example: required_if

enum ItemType: string
{
    case SKU = "sku";
    case VOUCHER = "voucher";
}

enum ItemType {
  SKU
  VOUCHER
}
input OrderItem {
  type: ItemType!
  uuid: String @rules(apply: ["required_if:type,sku"])
  code: String @rules(apply: ["required_if:type,voucher"])
}

at the end, the ItemType enum will passed to the Validator::validateRequiredIf function and it will compare it with a string, which is always false

see Laravel's ValidatesAttributes.php line 1589

Expected behavior/Solution

Probably convert all enum into its value/name before passing it to validator, but not sure any efficient way to do it or not.

Steps to reproduce

See the explanation above

Lighthouse Version
v5.61.0

-- Update --

// Make validator class to replace the value before validation

class MyValidator extends \Illuminate\Validation\Validator
{
    public function parseDependentRuleParameters($parameters): array
    {
        [$values, $other] = parent::parseDependentRuleParameters($parameters);
        if ($other instanceof UnitEnum) {
            $other = $other->name;
        }
        return [$values, $other];
    }

    public function getDisplayableValue($attribute, $value): string
    {
        if ($value instanceof UnitEnum) $value = $value->name;
        return parent::getDisplayableValue($attribute, $value);
    }
}

// replace the original validator somewhere in service provider

$this->app->afterResolving('validator', function (ValidatorFactory $factory){
    $factory->resolver(fn(...$params)=>new MyValidator(...$params));
});

Start with the GraphQL schema and enum example in the issue, then inspect Laravel's ValidatesAttributes.php around validateRequiredIf and the referenced dependent-parameter handling. Compare the reported behavior with the MyValidator workaround. Done means required_if and similar dependent rules correctly handle native PHP enum inputs, with coverage for the reproduced schema.