Updated the RefreshShowEpisodesMetadataCommandHandler to include logging for scenarios where episode still images are not retrieved successfully. Introduced warning logs for missing still URLs and download failures, improving traceability. Additionally, modified the TmdbMetadataProvider to implement a fallback mechanism for episode still images, ensuring that appropriate imagery is displayed even when localized images are unavailable. Updated related tests to verify the correct behavior of these logging enhancements and fallback logic.