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/ProjectionWorkstation/Common/pws_rfb_protocol.h

@@ -3,10 +3,10 @@
 #pragma once
 
 #include <QtGlobal>
-#include <QVector>
-#include <QDataStream>
+#include <QtCore/QVector>
+#include <QtCore/QDataStream>
 #include <QVarLengthArray>
-#include <QIODevice>
+#include <QtCore/QIODevice>
 
 namespace ProjectionWorkstation
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/ProjectionWorkstation/Common/pws_vnc_handler.h

@@ -4,10 +4,10 @@
 
 #include "pws_rfb_protocol.h"
 
-#include <QObject>
-#include <QTcpSocket>
-#include <QDataStream>
-#include <QHostAddress>
+#include <QtCore/QObject>
+#include <QtNetwork/QTcpSocket>
+#include <QtCore/QDataStream>
+#include <QtNetwork/QHostAddress>
 
 #include <pwscommon_export.h>
 #include <LtsProjectionWorkstation/logger.h>

qt6-after/qt6-migrated-legatus/Lts/Plugins/ProjectionWorkstation/Gui/pws_control_dialog.cpp

@@ -13,8 +13,8 @@
 
 #include <nglsettings/nglsettings_connections.h>
 
-#include <QJsonObject>
-#include <QUuid>
+#include <QtCore/QJsonObject>
+#include <QtCore/QUuid>
 #include <QHostInfo>
 
 #include <functional>

qt6-after/qt6-migrated-legatus/Lts/Plugins/ProjectionWorkstation/Gui/pws_vnc_viewer_dialog.cpp

@@ -5,12 +5,12 @@
 
 #include <LtsProjectionWorkstation/logger.h>
 
-#include <QMutexLocker>
-#include <QPainter>
+#include <QtCore/QMutexLocker>
+#include <QtGui/QPainter>
 #include <QOpenGLPaintDevice>
-#include <QOpenGLFunctions>
-#include <QThread>
-#include <QTimer>
+#include <QtGui/QOpenGLFunctions>
+#include <QtCore/QThread>
+#include <QtCore/QTimer>
 
 #include <cmath>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/ProjectionWorkstation/Gui/pws_vnc_viewer_dialog.h

@@ -6,12 +6,12 @@
 #include <Plugins/ProjectionWorkstation/Common/pws_rfb_protocol.h>
 #include <Plugins/ProjectionWorkstation/Common/pws_vnc_handler.h>
 
-#include <QMutex>
+#include <QtCore/QMutex>
 #include <QOpenGLFramebufferObject>
 #include <QOpenGLTextureBlitter>
-#include <QOpenGLWidget>
-#include <QOpenGLFunctions>
-#include <QHostAddress>
+#include <QtWidgets/QOpenGLWidget>
+#include <QtGui/QOpenGLFunctions>
+#include <QtNetwork/QHostAddress>
 
 namespace Ui { class VncViewerDialog; }