Function buildLivestreamThumbnailFinalKey

buildLivestreamThumbnailFinalKey(
    userId: string,
    livestreamId: string,
    uniqueId: string,
    extension: string,
): string
Final livestream thumbnail key after complete copies pending → final.
Parameters
- userId: string
  Owner user id.
- livestreamId: string
  Livestream row id.
- uniqueId: string
  Unique filename segment (e.g. UUID).
- extension: string
  File extension with or without a leading dot (e.g. jpg, .png).
Returns string
R2 object key for the bound thumbnail.
- Defined in lib/r2.ts:875