Add release notes and update project configuration for v0.4.1 release (…

…#207)

Merge pull request #201 from ProofFrog/release-v0.4.0

Add release notes and update project configuration for v0.4.0 release

Update release notes and bump version to 0.3.1 (#109)

Co-authored-by: Claude Opus 4.6 <[email protected]>

Add release notes and bump version to 0.3.0 (#99)

Add RELEASE.md with release notes covering all changes since v0.2.0
and update pyproject.toml with the new version number and a release
notes URL.

Co-authored-by: Claude Opus 4.6 <[email protected]>