svc.sh adopt always printed db_marker=established, even when the installed
artifact lacked identity capability and the marker stayed pending. It now
reads the marker back and warns when identity was not established.
The deploy identity gate reported a pre-v27 database (identity table
missing) as a foreign row or mismatch. It now explains that the schema
predates the identity table and gives the backup, stop, migrate and
redeploy steps. It still refuses before stopping the old service and never
migrates on its own.
Why: both messages misled the 2026-10-21 GenUI prod upgrade.
Evidence: agent-exec unit dev-svc-identity-adopt-gate-messages (cursor, attempt 1, terminal=success); python3 -m unittest tests.test_svc_identity: 31 tests OK (1 skipped).
Impact: svc.sh operator messages for adopt and the deploy identity gate; no change to success paths.
Refs: Dev task fix/genui-prod-upgrade-followups.
Co-authored-by: Cursor <cursoragent@cursor.com>
