#159 Код-ревью сервиса кеширования фотографий

Сделать код-ревью и рефакторинг:

@Component
public final class CachedPhotosService {
    private static final String RESIZED_PHOTO_CACHE_NAME = "RESIZED_PHOTO_CACHE_NAME";

    @Autowired
    private PhotoRepository photoRepository;

    @Autowired
    private PhotoValidationService photoValidationService;

    @Autowired
    private PhotoOperations photoOperations;

    @Cacheable(cacheNames = RESIZED_PHOTO_CACHE_NAME)
    public PhotoDTO resizedPhoto(String photoId, int width, int height) {
        photoValidationService.validateSize(width, height);

        Photo photo = photoRepository.findById(photoId);

        PhotoDto photoDto = ConvertionUtils.convert(photo);
        var resizedPhoto = photoOperations.resize(photoDto, width, height);

        return resizedPhoto;
    }
}