Fix INGLLogger initialization for BUILD_RTI=OFF compatibility

- Replace NGL::NGLLoggerBootstrap::getNGLRootLogger() with NGL::getMemoryLogger()
  in all VideoOverlayManagement handler classes
- Fix Qt6 signal syntax in avs_interface.cpp (error → errorOccurred)
- Ensures compatibility with BUILD_RTI=OFF builds
- Affected files:
  * logger.cpp - Added BUILD_RTI guards, use NGL::getMemoryLogger()
  * avs_interface.cpp - Logger init + Qt6 signal fix
  * main_handler.cpp - Logger init fix
  * handler_overlays.cpp - Logger init fix
  * handler_infrastructure_data.cpp - Logger init fix
  * handler_participant_data.cpp - Logger init fix

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Services/VideoOverlayManagement/logger.cpp

@@ -7,7 +7,12 @@
   */
 
 #include "logger.h"
+
+#if BUILD_RTI
 #include <NGLLogger/NGLLoggerBootstrap.h>
+#else
+#include <NGLLogger.h>
+#endif
 
 namespace VideoOverlayManagement
 {
@@ -21,6 +26,7 @@ LOGGER_T getLogger(const char *name)
   loggerName.append(ns, sizeof(ns) - 1);
   loggerName.append(name, len);
 
+#if BUILD_RTI
   try
   {
     return NGL::NGLLoggerBootstrap::getNGLRootLogger().
@@ -31,6 +37,9 @@ LOGGER_T getLogger(const char *name)
     fprintf(stderr, "Error retrieving logger: %s", ex.what());
     abort();
   }
+#else
+  return NGL::getMemoryLogger(loggerName);
+#endif
 }
 
 } // namespace VideoOverlayManagement