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/Services/AlarmManagement/ModuleTests/alm_tests.cpp

@@ -9,10 +9,10 @@
 
 #include <nglapplication/nglcoreapplication.h>
 #include <LtsCommandLineParser/LtsCommandLineParser.h>
-#include <QTimer>
-#include <QDateTime>
-#include <QJsonObject>
-#include <QJsonDocument>
+#include <QtCore/QTimer>
+#include <QtCore/QDateTime>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonDocument>
 
 /* ----------------------------------------------------------------------------------
  * HOW TO RUN THE TESTS

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/alm_types.h

@@ -3,7 +3,7 @@
 // STUB-HEADER: Diese Datei wird normalerweise von ddsdtc generiert
 // Für die Migration erstellen wir minimale Typ-Definitionen
 
-#include <QString>
+#include <QtCore/QString>
 #include "almcommon_export.h"
 
 namespace AlarmManagement

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/handler_configure_alarms.cpp

@@ -9,10 +9,10 @@
 #include "handler_configure_alarms.h"
 #include <utility>
 #include "initialization.h"
-#include <QJsonObject>
-#include <QJsonDocument>
-#include <QSet>
-#include <QTimer>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonDocument>
+#include <QtCore/QSet>
+#include <QtCore/QTimer>
 #include <ProjectDataManagement/pdm_translation.h>
 #include <LtsUtilsCore/json_object.h>
 

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/handler_configure_alarms.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 #include "dds_handler.h"
 #include "logger.h"
 #include <alm_db.h>

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/handler_emergency_call.cpp

@@ -14,9 +14,9 @@
 #include "alm_db.h"
 #include <DDS/DTS/generic_dts.h>
 
-#include <QJsonObject>
-#include <QJsonDocument>
-#include <QDebug>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonDocument>
+#include <QtCore/QDebug>
 namespace AlarmManagement
 {
 HandlerEmergencyCall::HandlerEmergencyCall(const std::shared_ptr<HandlerConfigureAlarms> &configAlarmHandler,

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/handler_emergency_call.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 #include <AlarmManagement/alm_db.h>
 #include "dds_handler.h"
 #include "logger.h"

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/handler_participant.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 #include "dds_handler.h"
 #include "logger.h"
 

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/object_emergency_call.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 #include <dds_handler.h>
 #include "logger.h"
 

qt6-after/qt6-migrated-legatus/Lts/Services/AlarmManagement/settings.h

@@ -6,7 +6,7 @@
   */
 
 #pragma once
-#include <QString>
+#include <QtCore/QString>
 
 namespace NGL
 {