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

.gitignore

@@ -142,3 +142,7 @@ C:*
 
 # project-context-sync (auto-generated, local only)
 PROJECT_STATE.md
+
+# Test results (synced via Syncthing, not git)
+test_results/*.json
+test_results/*.log