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/EffectShowClient/Gui/esc_effect_show_gui_plugin.cpp

@@ -15,8 +15,8 @@
 
 #include <Services/EffectShowClient/esc_operator_rights.h>
 
-#include <QCoreApplication>
-#include <QUrlQuery>
+#include <QtCore/QCoreApplication>
+#include <QtCore/QUrlQuery>
 
 namespace EffectShowClient
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_effect_show_gui_plugin.h

@@ -13,7 +13,7 @@
 #include <EffectShowManagement/esm_data_plugin_interface.h>
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h>
 
-#include <QTimer>
+#include <QtCore/QTimer>
 
 namespace LtsNotification
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_firing_explosion.h

@@ -7,7 +7,7 @@
 #include <LtsSession/lts_session.h>
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h>
 #include <LtsWidgets/lts_dialog.h>
-#include <QTimer>
+#include <QtCore/QTimer>
 #include <Services/EffectShowClient/esc_dtc.h>
 #include <Services/EffectShowClient/esc_ftc.h>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_firing_smoke.cpp

@@ -7,7 +7,7 @@
 #include "esc_smoke_state.h"
 #include "ui_esc_firing_smoke.h"
 
-#include <QString>
+#include <QtCore/QString>
 
 namespace EffectShowClient
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_firing_smoke.h

@@ -7,7 +7,7 @@
 #include <LtsSession/lts_session.h>
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h>
 #include <LtsWidgets/lts_dialog.h>
-#include <QTimer>
+#include <QtCore/QTimer>
 #include <Services/EffectShowClient/esc_dtc.h>
 #include <Services/EffectShowClient/esc_ftc.h>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_operating_condition.cpp

@@ -7,8 +7,8 @@
 #include "esc_smoke_state.h"
 #include "ui_esc_operating_condition.h"
 
-#include <QStringList>
-#include <QTimer>
+#include <QtCore/QStringList>
+#include <QtCore/QTimer>
 #include <ngltools/ngltools_dtg.h>
 
 namespace EffectShowClient

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_operating_condition.h

@@ -5,7 +5,7 @@
 #include <EffectShowClient/logger.h>
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h>
 #include <LtsWidgets/lts_dialog.h>
-#include <QTimer>
+#include <QtCore/QTimer>
 #include <Services/EffectShowClient/esc_dtc.h>
 #include <Services/EffectShowClient/esc_ftc.h>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_order_list.cpp

@@ -12,7 +12,7 @@
 #include <LtsPrinting/printing.h>
 #include <PluginInterfaces/gui_plugin_interface.h>
 #include <Plugins/SituationMapPlugin/situation_map_gui_plugin_interface.h>
-#include <QTreeView>
+#include <QtWidgets/QTreeView>
 
 namespace EffectShowClient
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_safety_confirmation_widget.cpp

@@ -5,7 +5,7 @@
 #include "ui_esc_safety_confirmation_widget.h"
 #include "esc_smoke_state.h"
 
-#include <QTimer>
+#include <QtCore/QTimer>
 
 namespace EffectShowClient
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_safety_confirmation_widget.h

@@ -2,7 +2,7 @@
 
 
 #pragma once
-#include <QWidget>
+#include <QtWidgets/QWidget>
 
 #include <Services/EffectShowClient/esc_ftc.h>
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h>

qt6-after/qt6-migrated-legatus/Lts/Plugins/EffectShowClient/Gui/esc_smoke_state.h

@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <QWidget>
+#include <QtWidgets/QWidget>
 
 namespace Ui {
 class SmokeState;