- _target_mirror_eligible accepts a precomputed origin_match so the sole
production caller stops re-resolving origin + re-running the origin
match it computed one line earlier (tests keep the self-contained path).
- Document why the fallback branch restates _cron_mirror_delivery_enabled
precedence (standalone correctness: per-job False must beat raw global
True) instead of collapsing it to the call-site-coupled 'return True'.
- Retarget the stale in_channel warn branch from 'not origin_target' to
'not inchannel_continuable' and reword it for the widened seed scope.
ded9470990