03 Plan Registry Audit

Verdict PLAN_REGISTRY_HARDCODED and PLAN_REGISTRY_STALE_RISK.

Builder calls legacy snapshot and inserts only 13 positive-delta rows from 74-row snapshot universe. Tier and blocked reason are hardcoded. source_metadata_hash hashes only collection/strategy/delta/divergence and excludes trigger fingerprint, reviews, tier policy, watermark and most metadata. Row checksum also incomplete. plan_id is timestamp/arbitrary caller text, not content-addressed. No plan header, unique-current constraint, tier/supersession FK, immutability, or scheduler. Builder is PUBLIC EXECUTE. Regeneration is manual and does not prove freshness/deterministic identity.