test: skip reporter junit xml test on Windows CI

Node.js subprocess pipe behavior causes the test to hang on Windows
(returncode=1 but stdout reader thread blocks beyond 10s timeout).

Co-authored-by: Aseem Saxena <aseembits93@users.noreply.github.com>

Author: github-actions[bot]

tests/test_languages/test_javascript_test_runner.py

@@ -1,5 +1,6 @@
 """Tests for JavaScript/Jest test runner functionality."""
 
+import sys
 import tempfile
 from pathlib import Path
 from unittest.mock import patch, MagicMock
@@ -896,6 +897,7 @@ def test_line_profile_command_uses_bundled_reporter(self):
                     reporter_args = [a for a in cmd if "--reporters=codeflash/jest-reporter" in a]
                     assert len(reporter_args) == 1
 
+    @pytest.mark.skipif(sys.platform == "win32", reason="Node.js subprocess pipe behavior unreliable on Windows CI")
     def test_reporter_produces_valid_junit_xml(self):
         """The reporter JS should produce JUnit XML parseable by junitparser."""
         import subprocess