Qt6 Migration: BUILD_RTI guards und CMake fixes

- BUILD_RTI conditional compilation für RTI Connext DDS dependencies
- Namespace fixes in core_dtc.h (Core:: → DDS::Core::)
- CMakeLists.txt: BUILD_RTI option und conditional dependencies
- Handler minelayer: namespace closing mit BUILD_RTI guard
- Build erfolgreich mit BUILD_RTI=OFF validiert

Signed-off-by: Torsten Wierschin <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-legatus/Lts/Services/OcBaseDownload/WebSocketInterface/Messages/client_message.cpp

@@ -128,7 +128,7 @@ ClientMessage::ClientMessage(DataManager *dataManager, LtsWebSocket::ReplyHandle
 
 // ####### ServicesInformation begin #######
 ErrorMessage::ErrorMessage(DataManager *dataManager, LtsWebSocket::ReplyHandler *client, const QString &type, const int typeId, const QString &uuid, const QJsonValue &data) : ClientMessage(dataManager, client, type, typeId, uuid, data),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {}
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {}
 
 void ErrorMessage::process()
 {