fix(git_helper): Windows subprocess crash fix + multiplatform E2E CI (#2717)

* 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

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "comfyui-manager"
 license = { text = "GPL-3.0-only" }
-version = "4.1b6"
+version = "4.1b7"
 requires-python = ">= 3.9"
 description = "ComfyUI-Manager provides features to install and manage custom nodes for ComfyUI, as well as various functionalities to assist with ComfyUI."
 readme = "README.md"