08 — Supertrack H: Feasibility / Scale Final Scan

Verdict: FEASIBILITY_SCALE_VERIFIED

Check	Finding
implementable in PG16.13 + pgcrypto	PASS — SHA-256 (pgcrypto digest), canonical jsonb, standard DDL / range partitioning / typed DOMAINs (qt001_cp.sha256, positive_bigint, nonnegative_bigint)
object-count-independent	PASS — hashes are over bounded membership (per run / per epoch), not over all objects
no hot-path full scan	PASS — membership scoped by run_id / control_epoch on FK columns; PK-terminated orders
no row-by-row apply path introduced by micro-patch	PASS — the patch is hash-spec only; no new apply path
no unbounded hash over runtime object data	PASS — aggregates bounded by sealed requirement sets / ACTIVE required capabilities / per-epoch activations
no unbounded dependency recursion	PASS
no production-blocking locks	PASS — READ-ONLY; nothing applied
retention/partitioning coherent	PASS — 7 high-volume event/result tables range-partitioned on immutable event time from sealed storage-class; capability_run/signoff/quorum/post-activation stay unpartitioned identity anchors so inbound FK identity is stable
rollback returns safe-blocked state	PASS — new version / append-only; consolidated reverse order; all live steps remain blocked
implementation can proceed later without guessing	PASS — every H04/H05/H02 sub-payload key, membership predicate, and order column now resolves to a named table.column (DDL-grounded)

The P-04 fail-closed stance imposes a manifest-version + quorum cost to add a performance index — a deliberate operational trade-off, not a scale risk.

Result: FEASIBILITY_SCALE_VERIFIED.