Mergeback v4.31.0 refs/heads/releases/v4 into main

[github-actions]

This PR bumps the version number and updates the changelog after the v4.31.0 release.

Please do the following:

• Remove and re-add the "Rebuild" label to the PR to trigger just this workflow.
• Wait for the "Rebuild" workflow to push a commit updating the distribution files.
• Mark the PR as ready for review to trigger the full set of PR checks.
• Approve and merge the PR. When merging the PR, make sure "Create a merge commit" is
  selected rather than "Squash and merge" or "Rebase and merge".

[github-actions]

Pushed a commit to rebuild the Action. Please mark the PR as ready for review to trigger PR checks.

[Copilot]

Pull Request Overview

This PR merges changes from the v4.31.0 release branch back into main, bumping the version to 4.31.1 and updating the changelog to reflect the v4.31.0 release.

Key Changes

• Version number updated from 4.31.0 to 4.31.1 in package.json and generated JavaScript files
• CHANGELOG.md updated to document the v4.31.0 release with a new UNRELEASED section

Reviewed Changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated no comments.

File	Description
package.json	Version bumped to 4.31.1
CHANGELOG.md	Added v4.31.0 release section and new UNRELEASED placeholder
lib/*.js	Generated JavaScript files updated with new version number