Backfill changelog and add automated changelog workflow

[claude]

Note

Description

Adds a decoupled GitHub Actions workflow that automatically regenerates the root CHANGELOG.md from git tags and commit messages after a release. The workflow runs via workflow_run after "Manual Package Publish" completes (or manually via workflow_dispatch), so a changelog failure can never crash a release. This PR also backfills the changelog for versions v0.0.52 through v0.1.1.

Related Issue

None

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Other (please describe):

Changes Made

• Add .github/workflows/update-changelog.yml, a new CI workflow that regenerates CHANGELOG.md from git tags + commit messages
• Trigger the workflow via workflow_run after the "Manual Package Publish" workflow succeeds, plus workflow_dispatch for manual runs — fully decoupled so a changelog failure cannot break a release
• Use anthropics/claude-code-action (claude-haiku-4-5) with a narrowly scoped allowlist (git tag, git log, Read, Edit(CHANGELOG.md)) following the process in .claude/commands/update-changelog.md
• Generate a scoped GitHub App token and commit/push the regenerated changelog back to main
• Backfill CHANGELOG.md entries for v0.0.52 through v0.1.1

Testing

• I have tested these changes locally
• I have added/updated tests as needed
• All tests pass (`npm test`)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have updated `docs/` (AGENTS.md) if I made architectural changes

Additional Notes

This PR only touches CI configuration and documentation (the changelog); there is no application/runtime code to test. The new workflow follows the existing changelog process documented in .claude/commands/update-changelog.md.

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_{🤖 Generated by Claude | 2026-07-05 14:37 UTC | 0e44048}

[github-actions]

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  "dependencies": {
    "base44": "npm:@base44-preview/cli@0.1.1-pr.558.0e44048"
  }
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