The labeling UI was falling back to "user N" for any assigned cluster
whose user wasn't the video owner — e.g. an admin re-labels a video
they don't own. With the resolver now resolving usernames for every
confirmed cluster, the FE can render real names regardless of who's
viewing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
