Add workflow to trigger changelog-automation on CHANGELOG.md changes

[augmentmoogi]

Add a GitHub Actions workflow that automatically triggers the changelog-automation repository's workflow whenever CHANGELOG.md is updated on main.

What's Changing

Creates .github/workflows/trigger-changelog-automation.yml, which listens for pushes to main that modify CHANGELOG.md and dispatches the changelog.yml workflow in augmentcode/changelog-automation via the GitHub API.

Key Details

• Trigger: push to main with a path filter on CHANGELOG.md
• Action: Sends a POST request to the changelog-automation repo's workflow_dispatch endpoint targeting main
• Authentication: Uses the CHANGELOG_AUTOMATION_PAT secret for cross-repository authorization
• Request: Uses curl -sf so the job fails fast if the dispatch call returns a non-success status

This removes the need to manually kick off the downstream changelog automation whenever the changelog is updated through a PR merge or direct push.

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[github-actions]

This workflow cleanly dispatches the downstream changelog-automation workflow and uses curl -sf so it fails fast on non-success responses. My only suggestion is to explicitly scope the job's GITHUB_TOKEN permissions, which is consistent with the other workflows in this repo and follows the principle of least privilege.

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[augment-app-staging]

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