Tier 2 dev workflow: Windows test runner + result sync

- run_tests.bat: double-click test runner with JSON result capture
- run_script.bat: run any script with output capture
- test_results/ folder for Syncthing-based result sharing
- Auto-mark NX-dependent tests for --quick mode
- pytest-json-report for structured results

tests/conftest.py

@@ -9,6 +9,20 @@ from pathlib import Path
 # Add project root to path
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
+
+def pytest_configure(config):
+    """Register custom markers."""
+    config.addinivalue_line("markers", "nx: requires NX Open (skip with -m 'not nx')")
+    config.addinivalue_line("markers", "slow: slow tests (skip with -m 'not slow')")
+
+
+def pytest_collection_modifyitems(config, items):
+    """Auto-mark tests that import NXOpen."""
+    for item in items:
+        # Auto-mark files with 'nx' or 'journal' in name
+        if 'nx' in item.nodeid.lower() or 'journal' in item.nodeid.lower():
+            item.add_marker(pytest.mark.nx)
+
 @pytest.fixture
 def sample_study_dir(tmp_path):
     """Create a temporary study directory structure."""