* fix(git_helper): surface git stderr and use portable exit code
- Redirect exception output to stderr for diagnostic visibility
- Surface GitCommandError.stderr when available
- Use sys.exit(1) instead of sys.exit(-1) for portable exit codes
- Remove debug print statements
* fix(e2e): cross-platform E2E tests with file-based stdout capture
- Cross-platform cm-cli path (Scripts/cm-cli.exe vs bin/cm-cli)
- File-based stdout/stderr capture to avoid Windows pipe buffer loss
- Rename uv-compile → uv-sync for standalone command refs
- Update conflict test packs: ansible → python-slugify/text-unidecode
- Add .trash_* cleanup and retry+rename for Windows file locks
- Add test_e2e_git_clone.py for nightly install via ComfyUI server
- Add setup_e2e_env.py cross-platform setup script
* feat(ci): add multiplatform E2E workflow (ubuntu/windows/macos)
Matrix: ubuntu-latest, windows-latest, macos-latest × Python 3.10
Triggers on push to main/feat/*/fix/* and PRs to main.
* bump version to 4.1b7
