Docker as root left 0600 .sig files the runner could not chmod
(run 1050), so publish_tree never moved the tree into
/srv/breadway-dl/arch/x86_64. Sign as the host uid so nginx can
read the files and the next publish can replace them.
Host job on hestia (no container) collects breadlock plus the ISO AUR
republishes from the Forgejo registry, detach-signs them, repo-add -s,
and writes /srv/breadway-dl/arch/x86_64/. ISO SigLevel stays Never.