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/Proxies/Buildings/BuildingControlUnit/handle_http_request.cpp

@@ -12,7 +12,7 @@ namespace BuildingControlUnit
 HandleHttpRequest::HandleHttpRequest(bool useQueue, QObject *parent) : QObject(parent)
   , m_nam(new QNetworkAccessManager(this))
   , m_bUseQueue(useQueue),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {
   INFO_LOG(m_logger) << "Using Queue: " << m_bUseQueue;
   connect(m_nam, &QNetworkAccessManager::finished,
           this, &HandleHttpRequest::onReplyFinished);