fix: harden governance execution for v0.1.1

[Liyurun]

Summary

• restore chained multi-statement lineage and true pre-action rollback state
• invalidate idempotency success after rollback
• require code-owned authorization grants and adapter-generated reversibility evidence
• install the built wheel and run the governance Quickstart in CI
• align Python/version/identity documentation and fix detail-label layout

Verification

• 361 tests passed
• foundation coverage: 89.29%
• Python 3.12 clean-wheel governance run/verify: success, 7 audit events
• 1,000 and 10,000 SQL deterministic scale benchmarks: passed
• Playwright desktop 1440x1000 and mobile 390x844: no overflow or console errors
• Twine, capability, layering, random-ID, open-source, and release-asset checks: passed