Merge feature/lts-viewer-validation-testing-phase into feature/qt6-migration-basis-modules-merge

Resolves 1 conflict (new_docker_build.sh, union of viewer-only + codification options); folds in fixes for pre-existing defects surfaced by the validation runs (KDReports-qt6 wiring, LtsSession RTI linking, LtsFileDialog/WLS/BSM Qt6/RTI API migration, GROUP4 target list, new --cmake_build_flags option); validated with BUILD_RTI=ON BUILD_GRANTLEE=ON in 3 Docker runs (run 3: build green, 6 base-state first-run CTest failures documented).

qt6-after/qt6-migrated-legatus/Lts/Proxies/WirelessLocationSystem/web_socket_handler.cpp

@@ -10,6 +10,8 @@
 #include "wls_handler.h"
 #include "wls_participant_handler.h"
 
+#include <NGLLogger/NGLLoggerBootstrap.h>
+
 #include <LtsUtils/LtsUtilsCore/dds_vector.h>
 
 #include <QtCore/QJsonDocument>