The round-trip test builds its catalog from the models (which already
carry the head schema), then stamps the revision that was newest when the
test was written and replays everything above it. Any migration landing
on top therefore ran its DDL against a schema it had not rolled back -
the new computes.auto_connect migration failed with "duplicate column
name: auto_connect".
Stamp the current head instead and let the downgrade roll back every
revision above the inventory one before the upgrade replays them.
Preserve image reconciliation, locking, and regression coverage while integrating upstream release, dependency, typing, and formatting updates. Align feature code with the new Ruff checks.
