Endpoint interface

[pionl]

When using fake overrides you need to pass interface and implementation into makeEndpoint method. This changes helps PHPStan to check, if interface is used in the real implementation.

public function unitsAvailabilities(): UnitsAvailabilitiesEndpointInterface
    {
        return $this->makeEndpoint(endpoint: UnitsAvailabilitiesEndpointInterface::class, implementation: UnitsAvailabilitiesEndpoint::class);
    }