## Summary

Describe the problem this PR solves and why this approach was chosen.

## Change Type

- [ ] Bug fix
- [ ] Feature
- [ ] Refactor
- [ ] Documentation
- [ ] CI/CD or automation
- [ ] Security hardening

## Scope

- [ ] `sirius-ui`
- [ ] `sirius-api`
- [ ] `sirius-engine`
- [ ] Infrastructure (`postgres`, `rabbitmq`, `valkey`, compose)
- [ ] Documentation
- [ ] Other (describe below)

## Related Issue

Closes #

## Validation

- [ ] I ran required local validation for this change
- [ ] I attached logs, screenshots, or output where relevant
- [ ] I tested failure paths or edge cases where applicable
- [ ] CI checks are expected to pass for this PR

## Security and Risk Review

- [ ] No security impact
- [ ] Security impact reviewed and documented
- [ ] Rollback steps are documented for risky operational changes

## Documentation

- [ ] No docs change needed
- [ ] Updated `README.md`, `CONTRIBUTING.md`, `SECURITY.md`, or related docs
- [ ] Added/updated issue templates or workflow docs

## Deployment Notes

List any operational notes (migrations, secret changes, compose changes, required order of deployment, etc.).

## Additional Context

Add anything reviewers should know (tradeoffs, follow-ups, known limitations).