release: 0.4.1b7

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

## Changelog

### Changed
- Settings `records.stream_type` now stores CDF stream template names (`BasicArchive`, `BasicLiveData`, etc.) instead of `mutable`/`immutable`; legacy values still map when creating streams (#300)

### Fixed
- Release workflow restores `git describe --exclude '0.3.*'` on `main` after `git tag --merged` version sort incorrectly picked `v0.0.0` and published `0.0.1b1` instead of `0.4.1b7`
