fix #241 - bug: Generated CHANGELOG files are missing Apache license header

[fantonangeli]

Closes #241

Describe the Bug

The release preparation workflow generates package CHANGELOG.md files without the Apache license header.
This makes the Apache RAT check fail on release PRs.
See logs here:

Run APACHE_RAT_JAR="${RUNNER_TEMP:-/tmp}/apache-rat-${APACHE_RAT_VERSION}.jar"
❌ Apache RAT check FAILED - Files with unapproved licenses found:

! /packages/i18n/CHANGELOG.md
! /packages/serverless-workflow-diagram-editor/CHANGELOG.md
Error: Process completed with exit code 1.

Steps to reproduce

1. Run the release preparation workflow: https://github.com/serverlessworkflow/editor/actions/workflows/prepare-release.yaml
2. Open the generated release PR.
3. Check the CI :: License headers job.

Expected Behavior

Generated CHANGELOG.md files should include the Apache license header and pass the Apache RAT check.

Solution

I could not find a changeset option to prepend the license text in the CHANGELOG.
I tried locally adding the license before and after the package name, but that text was partially replaced or moved down with the version.
Adding the license to the bottom generated a correct changelog locally and the license was kept at the bottom as expected.
This should be ok for RAT, otherwise we can add the changelogs in .rat-excludes

[Copilot]

Pull request overview

This PR addresses issue #241 by ensuring package-level CHANGELOG.md files contain an Apache 2.0 license header so the Apache RAT license-header check passes during release PR CI.

Changes:

• Added an Apache 2.0 license header block (as an HTML comment) to the end of packages/i18n/CHANGELOG.md.
• Added an Apache 2.0 license header block (as an HTML comment) to the end of packages/serverless-workflow-diagram-editor/CHANGELOG.md.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/i18n/CHANGELOG.md	Appends Apache 2.0 license header to satisfy RAT license scanning for the generated changelog.
packages/serverless-workflow-diagram-editor/CHANGELOG.md	Appends Apache 2.0 license header to satisfy RAT license scanning for the generated changelog.

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[lornakelly]

LGTM