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/Lts/Services/ServiceManagement/WebSocketInterface/Messages/reply_message.cpp

@@ -54,7 +54,7 @@ ServicePortsInformationMessage::ServicePortsInformationMessage(const QVector<Exe
     QJsonObject obj({{EXERCISE_ID(), exercise.exerciseId},
                      {SERVICES(), services}
                     });
-    if (exercise.replayPartitionId.is_set())
+    if (exercise.replayPartitionId.has_value())
       obj.insert(REPLAY_PARTITION_ID(), exercise.replayPartitionId.get());
 
     exercises.append(obj);