Qt6 Migration: BUILD_RTI Guards, Export-Header und Include-Pfade korrigiert

- BUILD_RTI Guards in LtsSession implementiert (6 Dateien)
- LtsSessionDataDds Stub für BUILD_RTI=OFF erstellt
- Export-Header Stubs erstellt (GuezNasat, AlarmManagement, MarkerManagement)
- Include-Pfade korrigiert (resource_path.h, logger.h, Proxies)
- QStringRef → QString migriert (Qt6 Kompatibilität)
- Qt6::Gui Dependencies hinzugefügt (LtsElevation, AdvancedSymbology)
- FilterManagement-Plugins temporär vom Build ausgeschlossen
- MOC-Probleme gefixt (staticMetaObject, override final)
- Build erfolgreich: 1940 Targets mit BUILD_RTI=OFF im Docker-Container

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

qt6-after/qt6-migrated-legatus/Lts/Plugins/SituationMapPlugin/Gui/SituationMap/CMakeLists.txt

@@ -130,6 +130,7 @@ NGL_ADD_LIBRARY2(WS SitmapDds SHARED ${sitmap_dds_SRCS})
 NGL_TARGET_INCLUDE_DIRECTORIES(SitmapDds
   PUBLIC
     ${CMAKE_CURRENT_SOURCE_DIR}/../
+    ${CMAKE_SOURCE_DIR}/Lts/Viewer/SituationMap
 )
 NGL_TARGET_LINK_LIBRARIES(SitmapDds
   PUBLIC