Summary

Closing a pull request without merging it no longer creates a GitHub release.

Added

major-labels, minor-labels and patch-labels inputs to configure which label names drive each version bump.
tag-prefix input to configure the prefix used for the release tag.
tag and previous-version outputs.
A decision table written to the job summary explaining what the run decided.

The action now runs on Node 24.
The action now honors GITHUB_API_URL, so it runs on GitHub Enterprise Server.
A release created without notes of its own now uses GitHub's generated release notes instead of an empty body.
An explicit version without release-notes now creates a release instead of being skipped.

A pull request closed without being merged no longer produces a release, even when it has a release label (#2, #4).
Duplicate releases from the version being recalculated in the post step are no longer created (#103).
A merged pull request from a branch named after a version now produces a correct version.
The isolated-for-pull-request output was inverted and now reports correctly.
Releases now point at the actual merge commit instead of the ephemeral pull-request merge commit.