833c92ca

Author: Michael Lynch <git@mtlynch.io>

Committer: Michael Lynch <mtlynch@noreply.codeberg.org>

Persist caption edits (#361)

Replace the provisional update response with validated caption persistence.
Owners can update or clear captions, while invalid or missing media requests
receive explicit errors.

Reviewed-on: https://codeberg.org/mtlynch/little-moments/pulls/361