Fix model extract race issue to all classes

modules/ANSODEngine/ANSEngineCommon.h

@@ -26,6 +26,12 @@
 #define DEBUG_PRINT(x) std::cout << x << std::endl;
 //#define DEBUGENGINE
 //#define USE_TV_MODEL // Use model to detect if person is on TV screen or not
+
+// NOTE: ANSCENTER::ModelFolderLockGuard has been moved to Utility.h so that
+// non-ANSODEngine modules (ANSOCR, ANSLPR, ANSFR, ...) can use it without
+// pulling in ANSODEngine headers. It remains available here transitively
+// because this file #includes "Utility.h" above.
+
 const int MAX_HISTORY_FACE = 5;
 const int MAX_MISSING_FACE = 30;
 const int MAX_TRACKS = 200;