Overlay re-staged hash-verified (e3be85e4); the in-DC UCA origin set on all 15
apps and read back on a sample of each kind.

MEASURED AFTER: units in error are EXACTLY the three snap-dependent applications
-- mysql-innodb-cluster (x3), ovn-central (x3), vault -- 7 units. Every ceph and
OpenStack API app has cleared. State: 14 waiting, 5 maintenance, 4 blocked,
3 active, 7 error.

The deploy is now blocked on exactly ONE unbuilt thing: the snap path (ruling 2),
the D-135 items 2-3 gap.

Session progression, all measured: 22 error -> 17 (backports) -> 4 (prefer-ipv6)
-> 7 units in the single snap class. The count rose at the last step because more
units REACHED the snap stage, not because more broke.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf