Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewModels.cpp

@@ -55,7 +55,7 @@ QVariant ParticipantModel::data(const QModelIndex &index, int role) const
         break;
       }
     }
-    if (role == Qt::BackgroundColorRole)
+    if (role == Qt::BackgroundRole)
     {
       if (p.first == 0)
         return QVariant();