Release v0.12.0: Doctrine 0.9 coordination and qualified public distribution

[HLLMR]

Summary

Publish the accepted Doctrine 0.9 coordination work and coherent v0.12.0 package/release references through the existing positive-allowlist public projection.

• Matching role/batch/milestone templates, onboarding handoffs, and explicit 0.8-to-0.9 migration guidance.
• Release the previously merged approval-continuity, compact inspect --brief, and optional operational-preflight additions.
• Preserve the distinction between guidance and enforcement, and between distributed Doctrine 0.9 and the private instance's operative 0.8 binding. No automatic migration.

Related: #41. This PR does not change repository policy or authorize adopter changes.

Final verification

• Exact final native Windows: 848 tests, 13 skips, zero failures; Ubuntu: 848 tests, 4 skips, zero failures, sequential.
• Both native installed 0.12.0, exact wheel payload, identity/license/distribution and rebuilt public archive gates passed.
• Two independently built 139-file managed candidates are byte-identical. Managed privacy/projection checks ran last on both retained trees.
• Complete-tree ledger: 55b063d5bd1203f4a3c6829d75b7618ef51f669f9d8bc2ab29373ffa05c8ff26.
• Rebuilt public archive SHA-256: 1c5c86f2d5ec44d0d2f7a0b8e79999cbf8d8b83e04687fe7b2fc3b02f793fbaf.
• Fresh independent read-only publication review: APPROVE, no blockers. Direct document/manifest inspection is distinguished from Coordinator-executed tests and hash measurements.

The public provenance names the exact qualified private source commit. Earlier failed attempts, disclosed deviations and limits remain preserved; no complete-surface enforcement claim is made. The checked public bytes exclude private transactional history and host-local enforcement installation.

Merge only after the existing strict CI required check and resolved-thread gate pass, with no bypass. Then tag the exact merged commit as v0.12.0 promptly, attach only the rebuilt public distribution and checksum, and verify actual release immutability and downloaded asset bytes.