Function isLivestreamThumbnailFinalKeyForUser

isLivestreamThumbnailFinalKeyForUser(
    key: string,
    userId: string,
    livestreamId: string,
): boolean
Returns whether key is a final livestream thumbnail for the given user and livestream.
Parameters
- key: string
  R2 object key to validate.
- userId: string
  Expected owner user id.
- livestreamId: string
  Expected livestream row id.
Returns boolean
True when the key is under the user's final prefix for this livestream.
- Defined in lib/r2.ts:911