test: skip POSIX release packaging on Windows

- mark release-package.sh integration coverage as POSIX-only

- keep captured stdout and stderr in failures for easier CI diagnosis

Author: Kingson4Wu

tests/test_release.py

@@ -11,6 +11,8 @@
 from pathlib import Path
 from types import SimpleNamespace
 
+import pytest
+
 import git_auto_sync
 from git_auto_sync import cli, release
 
@@ -174,6 +176,7 @@ def fake_download(url, dest):
     assert config.read_text(encoding="utf-8") == "keep me\n"
 
 
+@pytest.mark.skipif(os.name == "nt", reason="release-package.sh requires a POSIX shell")
 def test_release_package_excludes_python_cache_files():
     repo = Path(__file__).resolve().parents[1]
     env = os.environ.copy()