Slice-7 teardown landed (ec68b1f); the whole #20 cutover is done. Collapsed
the now-complete cutover in-flight block to a COMPLETE summary + foot-gun
carry-forward, added the slice-7 Recent-decisions entry + detail file, and
flagged the two operator-gated post-ship actions (push + althing announce).
Archival drain deferred (file ~33 over soft cap; standing-posture entries
interleave the settled ones — a dedicated pass, not a milestone-checkpoint cut).
