v1.0.1

Governance and project hygiene:
- Add ai-governance-starter boilerplate: CLAUDE.md, AGENTS.md, SECURITY.md
- Add scripts/pre-commit and scripts/check-commit-attribution.sh
- Add .gitlab-ci.yml: commit attribution check on MRs
- Add .gitlab/merge_request_templates/Default.md
- Add docs/AI-COMMIT-CLEANUP.md
- Update CONTRIBUTING.md: AI contribution policy, writing conventions
- Narrow .gitignore /docs/ to /docs/planning/