Qt6 migration: Fix BUILD_RTI=OFF build errors in TrainingAreaBase

- training_area_telegrams.cpp: Fixed QJsonObject initializer syntax (Qt6 requires {{}} not ({}))
- training_area_telegrams.cpp: Fixed fromJson() methods to access m_* members directly
- training_area_telegrams.cpp: Fixed brace mismatches in multiple toJson() methods
- training_area_telegrams.h: Changed Header struct to public members for consistency
- tx_mixin.cpp: Fixed getEquipmentNumber() template for direct member access
- lts_coordinate.cpp: Added missing #include <iomanip>
- MIGRATION_STATUS.md: Added migration progress tracking document

C++17 constraint enforced due to RTI Connext DDS 7.7.0 incompatibility with C++20+

Build status: BUILD_RTI=OFF successful (0 errors, warnings only)

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

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/avm_data_plugin.cpp

@@ -15,8 +15,8 @@
 #include <AudioVideoManagement/Shared/avs_app.h>
 #include <AudioVideoManagement/stream_name_mapping.h>
 #include <OperatorManagement/opm.hpp>
-#include <QMap>
-#include <QPair>
+#include <QtCore/QMap>
+#include <QtCore/QPair>
 #include <QtGlobal>
 #include <LtsSession/lts_session_data_dds.h>
 #include <LtsSession/lts_session.h>
@@ -28,7 +28,7 @@
 
 
 
-#include <QDebug>
+#include <QtCore/QDebug>
 
 
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/avm_exercise_context.cpp

@@ -10,7 +10,7 @@
 #include <InfrastructureManagement/ism_dtc.h>
 #include <LtsSession/lts_session_data_dds.h>
 #include <ConnectDialog/connect_dialog_nt.h>
-#include <QObject>
+#include <QtCore/QObject>
 #include <QtGlobal>
 #include <utility>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/avs_session_context.cpp

@@ -25,7 +25,7 @@
 
 #include <nglsettings/nglsettings_connections.h>
 #include <LtsUtilsSettings/settings.h>
-#include <QObject>
+#include <QtCore/QObject>
 #include <QtGlobal>
 
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/avs_session_context.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #include <AudioVideoManagement/ava_types.h>
-#include <QString>
+#include <QtCore/QString>
 #include <memory>
 #include <functional>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/operator_settings_observer.h

@@ -5,8 +5,8 @@
 
 #include <AudioVideoManagement/ava_types.h>
 #include <boost/optional.hpp>
-#include <QChar>
-#include <QObject>
+#include <QtCore/QChar>
+#include <QtCore/QObject>
 #include <memory>
 
 namespace OperatorManagement

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/rt_profile_observer.cpp

@@ -6,7 +6,7 @@
 #include <AudioVideoManagement/ava_control.h>
 #include <AudioVideoManagement/avm_dtc.h>
 #include <LtsUtils/LtsUtilsCore/data_modification_enum.h>
-#include <QMap>
+#include <QtCore/QMap>
 
 
 namespace AudioVideoManagement

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Data/rt_profile_observer.h

@@ -6,8 +6,8 @@
 #include <AudioVideoManagement/ava_types.h>
 #include <AudioVideoManagement/rt_state.h>
 #include <AudioVideoManagement/avm.hpp>
-#include <QObject>
-#include <QVector>
+#include <QtCore/QObject>
+#include <QtCore/QVector>
 #include <boost/optional.hpp>
 
 enum class DataModification;