chore: add CHANGELOG.md check workflow on PRs #1

	name: Changelog Check
	on:
	pull_request:
	types: [opened, edited, synchronize, reopened]

	permissions:
	contents: read
	pull-requests: read

	jobs:
	changelog:
	name: Verify CHANGELOG update
	runs-on: ubuntu-latest
	steps:
	- name: Check CHANGELOG.md update or opt-out
	uses: actions/github-script@v7
	with:
	script: \|
	const optOut = 'No customer facing changes';
	const body = context.payload.pull_request.body \|\| '';

	if (body.toLowerCase().includes(optOut.toLowerCase())) {
	core.info(`PR description contains "${optOut}", skipping CHANGELOG.md check.`);
	return;
	}

	const files = await github.paginate(github.rest.pulls.listFiles, {
	owner: context.repo.owner,
	repo: context.repo.repo,
	pull_number: context.payload.pull_request.number,
	per_page: 100,
	});

	const changed = files.some((f) => f.filename === 'CHANGELOG.md');
	if (changed) {
	core.info('CHANGELOG.md was updated.');
	return;
	}

	core.setFailed(
	'CHANGELOG.md was not updated. Add a CHANGELOG.md entry, or if this PR has no customer facing changes, add "No customer facing changes" to the PR description to justify skipping the changelog.'
	);

Provide feedback