Why: An isolated PostgreSQL test demonstrates that explicit low IDs bypass the current committed-prefix guard and disappear across pages.
Evidence: The test-only RED and reviewed database/migration tradeoffs are bound to the documented candidate and exact SHA256.
Impact: Adds a human-review design for all online audit writes and exclusive offline copy; no runtime change or migration.
Refs: feature/rdm-two-trees-latest-templates W9
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