## Summary

Brief description of the changes.

## Type of Change

- [ ] New documentation
- [ ] Documentation update
- [ ] Architecture Decision Record
- [ ] Runbook / operational procedure
- [ ] Brand / design system update

## Checklist

- [ ] Markdown passes lint (`npx markdownlint-cli2 "**/*.md"`)
- [ ] All internal links are valid
- [ ] Mermaid diagrams render correctly
- [ ] Cross-references to related docs are included
- [ ] README.md table of contents updated (if adding new file)
- [ ] No proprietary information exposed beyond intended scope