v1.13.12 — Engine and Catalog Completion

[franchoy]

Scope

Completes the mandatory v1.x engine/catalog architecture at exact candidate SHA:

33aa1a563b1e6f7b09a86326c6bbd06d7b106e58

• Implements and adopts the catalog snapshot graph, placement, restore-plan, and GC-plan APIs across SQLite and PostgreSQL.
• Completes active engine ownership for folder store, list/search, configuration, snapshot reads, inspect/stats/verify, repair, recovery/startup recovery, Doctor, and live-GC planning.
• Enforces backend-neutral contracts, typed engine errors, application composition, dependency direction, and the thin-CLI boundary.
• Preserves CLI/JSON/exit-code, repository/storage, schema, transaction, locking, and backend behavior.
• Includes final stabilization for coherent GC catalog reads and exact inspect integer rendering.

Release boundary

This PR completes v1.13.12 only.

It does not close v1.x.

v1.13.13 remains the mandatory independent final audit and v2.x handoff gate.

SQLite-default portable-repository productization and broader cross-host,
distributed, NAS, and network-filesystem coordination remain deferred
beyond v1.x.

Final candidate evidence

Final exact candidate:

33aa1a563b1e6f7b09a86326c6bbd06d7b106e58

The complete Phase 21 exact-head gate passed for this SHA:

• local Profile A PASS;
• hosted exact-head validation PASS;
• 60/60 hosted checks successful;
• plain/AES-GCM correctness, stress, long-run, adversarial, smoke;
• Ubuntu/macOS/Windows cross-platform validation;
• four benchmark-integrity profiles;
• four timing-advisory profiles;
• engine/catalog SQLite/PostgreSQL contracts;
• repository coordination;
• snapshot gate;
• critical coverage;
• CodeQL;
• GitHub Advanced Security;
• Codacy.

All Phase 21 evidence associated with earlier candidate SHAs is historical
only.

Merge, main validation, release-branch deletion, annotated tag, tag CI,
publication, and v1.13.13 remain separate operations.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 2004 complexity · 75 duplication

Metric	Results
Complexity	2004
Duplication	75

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