fix(metadata): infer schema for Link URI variables from linked property

[bram123]

Q	A
Branch?	main for features
Tickets	Closes #8646
License	MIT
Doc PR

When defining URI variables using Link without an explicit schema, OpenAPI generated path parameters defaulted to generic string types and lost format information (such as UUID/ULID or integer types) from the target property metadata.

This PR infers primitive schema type and format in LinkFactory from the linked property when none is explicitly configured on the Link.

Functional Test

tests/Functional/OpenApiLinkSchemaTest.php

public function testLinkSchemaIsInferredFromLinkedProperty(): void
{
    $response = self::createClient()->request('GET', '/docs', [
        'headers' => ['Accept' => 'application/vnd.openapi+json'],
    ]);
    $this->assertResponseIsSuccessful();

    $json = $response->toArray();
    $parameters = $json['paths']['/link_schema_parents/{parentId}/children/{id}']['get']['parameters'];

    $parentParam = $parameters[0];
    $this->assertSame('path', $parentParam['in']);
    $this->assertTrue($parentParam['required']);
    $this->assertSame(['type' => 'string', 'format' => 'uuid'], $parentParam['schema']);

    $idParam = $parameters[1];
    $this->assertSame('path', $idParam['in']);
    $this->assertTrue($idParam['required']);
    $this->assertSame(['type' => 'integer'], $idParam['schema']);
}

[bram123]

PHPStan/PHPUnit failures seem unrelated?