The last 9 backlog users decompose into exactly two classes: api_keys.sod_acknowledged_by (NO ACTION to auth.users) blocks every keyed sandbox, and the WORM dimension_retag_log blocks any sandbox where a voucher line was retagged. cleanup_sandbox_user now deletes the user's api_keys explicitly (they must die with the sandbox anyway) and the company's retag log under the standard bypass; dimension_retag_log_immutable's DELETE branch honors gnubok.sandbox_cleanup with the same per-row sandbox re-verification as every other guard, UPDATE stays blocked. Fixture seeds both row types. Validated end-to-end on staging.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Mattsson
c912fc5633