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

comfyui_manager/common/git_helper.py

@@ -50,9 +50,6 @@ working_directory = os.getcwd()
 
 if os.path.basename(working_directory) != 'custom_nodes':
     print("WARN: This script should be executed in custom_nodes dir")
-    print(f"DBG: INFO {working_directory}")
-    print(f"DBG: INFO {sys.argv}")
-    # exit(-1)
 
 
 class GitProgress(RemoteProgress):
@@ -557,7 +554,9 @@ try:
             restore_pip_snapshot(pips, options)
     sys.exit(0)
 except Exception as e:
-    print(e)
-    sys.exit(-1)
+    print(e, file=sys.stderr)
+    if hasattr(e, 'stderr') and e.stderr:
+        print(e.stderr, file=sys.stderr)
+    sys.exit(1)