Cache issue for "url_link" enhancer

The generated URL has the associated metadata but doesn't capture it.

        $url = Url::fromUri($data['uri'], ['language' => $this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)]);

        // Use absolute urls if configured.
        $configuration = $this->getConfiguration();
        if ($configuration['absolute_url']) {
          $url->setAbsolute(TRUE);
        }

        $data['url'] = $url->toString();
      }

From the field item normalizer:

    $context = new Context($context);
    $context->offsetSet('field_item_object', $object);
    $context->offsetSet(CacheableNormalizerInterface::SERIALIZATION_CONTEXT_CACHEABILITY, $cacheability);
    $processed = $enhancer->undoTransform(
      $normalized_output->getNormalization(),
      $context
    );

The fix is something like

        $generatedUrl = $url->toString(TRUE);
        $context->offsetGet(CacheableNormalizerInterface::SERIALIZATION_CONTEXT_CACHEABILITY)->addCacheableDependency($url);

        $data['url'] = $generatedUrl->getGeneratedUrl();

Thanks, Matt! It seems to work when I replicate my steps. Created an MR with your changes.

Great!