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/SoundManagement/dds_handler.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 #include <DDS/DDSConnector/dds_connector.h>
 #include <DDS/Core/core_dtc.h>
 #include <DDS/Core/topic_lock_master.h>

qt6-after/qt6-migrated-legatus/Lts/Services/SoundManagement/handler_sounds.cpp

@@ -10,12 +10,12 @@
 #include <utility>
 #include "settings.h"
 #include "dds_handler.h"
-#include <QJsonObject>
-#include <QJsonDocument>
-#include <QJsonValue>
-#include <QSet>
-#include <QTimer>
-#include <QNetworkReply>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonDocument>
+#include <QtCore/QJsonValue>
+#include <QtCore/QSet>
+#include <QtCore/QTimer>
+#include <QtNetwork/QNetworkReply>
 #include <LtsUtilsCore/json_object.h>
 
 namespace SoundManagement

qt6-after/qt6-migrated-legatus/Lts/Services/SoundManagement/handler_sounds.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 #include "dds_handler.h"
 #include "logger.h"
 #include <som_db.h>
@@ -20,8 +20,8 @@
 #include <LtsCoordTrans/lts_coord_trans.h>
 
 // HTTP Request
-#include <QNetworkAccessManager>
-#include <QTimer>
+#include <QtNetwork/QNetworkAccessManager>
+#include <QtCore/QTimer>
 #include <QEventLoop>
 
 

qt6-after/qt6-migrated-legatus/Lts/Services/SoundManagement/main_handler.cpp

@@ -14,7 +14,7 @@
 #include "som_db.h"
 #include "settings.h"
 
-#include <QFileInfo>
+#include <QtCore/QFileInfo>
 
 namespace SoundManagement
 {

qt6-after/qt6-migrated-legatus/Lts/Services/SoundManagement/main_handler.h

@@ -6,7 +6,7 @@
   */
 #pragma once
 
-#include <QObject>
+#include <QtCore/QObject>
 
 #include "dds_handler.h"
 #include "handler_sounds.h"

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

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