- `_target_matches_origin` docstring still claimed fan-out targets are
"deliberately NOT mirrored" and mirroring is origin-only; that has been
false since origin_fallback landed and is doubly so with the home lane.
Point to `_target_mirror_eligible` for the policy instead.
- cron.md DM-only bullet said "origin DM session"; the config comment in
the same change already says "target DM". Align.
- Remove two `_expand_routing_tokens` unit assertions bolted into the
eligibility test; the `" ALL , slack "` parametrize covers expansion
end-to-end through `_resolve_delivery_targets`.