X-Emby-Token is refused for every key on 12.4 -- which is why this page
carried the false claim that no credential on the box could trigger a scan and
that the two Seerr keys were dead. The documented snippet now authenticates
with Authorization: MediaBrowser Token=..., reads 204 from /Library/Refresh,
and points at ~/.config/secrets/jellyfin (mirrored as JELLYFIN_API_KEY in the
ignored dankserver/.env). Law: prove a 401 against the ApiKeys table before
blaming the key.