release: 0.4.1b9

## Bump
- [ ] Major
- [ ] Minor
- [x] Beta
- [ ] Patch
- [ ] Skip

## Changelog

### Fixed
- _safe_apply_container preserves existing DMS container property definitions (including nullable) when adding new properties. Fixes deploy failure: Cannot change property orchestration_id from non-nullable to nullable in OrchestrationState when upgrading to versions that add edge_baseline_call_ids.
- Set explicit nullable=False on OrchestrationState.orchestration_id and nullable=True on HistoricJobQueue.orchestration_id for new container creation.
