Python interface for the IoTaWatt device

Releasing

Releases are published to PyPI automatically when a GitHub release is published:

1. Bump the version on main: uv version <new-version> (updates pyproject.toml and uv.lock), then commit the change.
2. Create a GitHub release with a v<new-version> tag (e.g. v0.2.1).
3. The release workflow builds the package and uploads it to PyPI using trusted publishing. It fails if the tag does not match the project version.