Record 5.3.1 publication evidence

[hannsxpeter]

Summary

• mark v5.3.1 as published across release docs, Pillars, roadmap, state, checkpoint, and generated views
• record merged commit, provenance workflow, npm latest, package integrity, GitHub assets, and published install evidence
• align the published-install verifier with the current dashboard output
• add read-only --inspect-project coverage and regression assertions

Verification

• node scripts/verify-published-install.js godpowers@latest
• npm run release:check
• npm run lint
• npm run test:self-truth
• node scripts/test-state-views.js
• node scripts/test-quick-proof.js
• all repository freshness detectors report fresh