v1.6.4

Fixed

• CI tests now pass in GitHub Actions 🧪
  • TestGetGitBranch_RealRepo failed in CI due to detached HEAD from PR checkout
  • Now uses isolated temporary git repository with known branch name
  • Added TestGetGitBranch_DetachedHead to verify empty string for detached HEAD

Full Changelog: v1.6.3...v1.6.4