addendum 23: H2 stage-3 re-run guards + H3 canary stage7 (tenant-onboard.sh), harness 2->12 cases ...

Gauntlet ALL GREEN. No cloud state touched; stage7 is explicit-only and
self-cleaning, VERIFY-LIVE flags in header for ssh user + flavor.

Revert: per addendum-23 REVERT line.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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