Function livestreamYouTubeThumbnailCacheKey

livestreamYouTubeThumbnailCacheKey(
    livestream: {
        $updatedAt: string;
        platforms: { youtube?: { thumbnailUpdatedAt?: string } };
    },
): string
Resolves the cache-bust key for a livestream YouTube thumbnail preview.
Parameters
- livestream: { $updatedAt: string; platforms: { youtube?: { thumbnailUpdatedAt?: string } } }
  Livestream row with optional YouTube thumbnail metadata.
Returns string
ISO timestamp string when available.
- Defined in lib/livestreams/youtube-thumbnail-preview.ts:30