Qt6 Migration: Complete migration with DDS/RTI support and build validation

Major Changes:
- Merged latest Qt5 devel content from dlbo (292 files changed, 7 new dirs)
- Consolidated forward-declarations and include folders
- Removed unneeded modules per Niklas' repo check list

Build System Fixes:
- Fixed CMake VERSION_GREATER syntax in ParticipantManagement/CMakeLists.txt
- Added VLC packages (libvlc-dev, vlc-plugin-base) to docker_build.sh
- Added PostgreSQL dev packages (libpq-dev, postgresql-server-dev-all) to Dockerfile
- Fixed locale warnings (ANSI_X3.4-1968 → C.UTF-8)
- Fixed ArcGIS SDK path warnings when BUILD_ARCGIS=OFF

Code Generation Fixes:
- Fixed IDL enum collisions (PortType→CorePortType/DdsutPortType, PdmEventType)
- Fixed Grantlee template svc_translation.cpp.grantlee:
  - Changed {{ idl_enum.name }}_def:: to {{ idl_enum.name }}::
  - Fixed .underlying() calls for C++11 scoped enums (enum class)
- Removed generated files from repo (moc_*, *_dtc.h, *_ftc.h)

Validation:
- BUILD_RTI=ON: SUCCESS
- BUILD_RTI=OFF: SUCCESS
- C++17 standard maintained for RTI 7.7 compatibility
- Ubuntu 26.04 Docker environment verified

Remaining Warnings (expected):
- BgViewer, KDChart, KDReports, Poppler-Qt6 not found (optional features)

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

qt5-before/dlbo/Lts/Tools/CnrProxyTester/message_model.cpp

@@ -0,0 +1,112 @@
+/**
+ * @RDE_HEADER@
+ * The MessageModel class handles message related data
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ * Created by Hannes Fritsche, SLSE, 2017-09-06
+ */
+
+#include "message_model.h"
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+
+MessageModel::MessageModel(QObject *parent)
+  : LtsAbstractTableModel<MessageInfo>( { tr("Time"), tr("Direction"), tr("Type"), tr("UUID"), tr("Data") }, parent)
+{
+  setData(QVector<MessageInfo>());
+}
+
+void MessageModel::addMessage(MessageModel::MessageDirection direction, const QString &message)
+{
+  QJsonParseError parseError;
+
+  QString uuid = QLatin1String("-");
+  QString data = uuid;
+
+  QJsonDocument doc = QJsonDocument::fromJson(message.toLatin1(), &parseError);
+
+  QString type;
+
+  if (parseError.error != QJsonParseError::NoError)
+    type = parseError.errorString();
+  else if (!doc.isObject())
+    type = QLatin1String("invalid");
+  else
+  {
+    QJsonObject obj = doc.object();
+
+    type = obj.value(QLatin1String("type")).toString(QLatin1String("not present"));
+    uuid = obj.value(QLatin1String("uuid")).toString(QLatin1String("not present"));
+
+    QJsonObject dataObj = obj.value(QLatin1String("data")).toObject();
+
+    if (dataObj.isEmpty())
+      data = QLatin1String("not present");
+    else
+      data = QString::fromUtf8(QJsonDocument(dataObj).toJson());
+  }
+
+  addMessage(direction, type, uuid, data);
+}
+
+void MessageModel::addMessage(MessageModel::MessageDirection direction, const QString &type, const QString &uuid, const QString &data)
+{
+  int32_t rows = rowCount();
+
+  onDataChanged({rows, toString(direction), type, uuid, data}, DataModification::eAdded);
+}
+
+QVariant MessageModel::data(const QModelIndex &index, int role) const
+{
+  if (role != Qt::DisplayRole || !indexIsValid(index))
+    return QVariant();
+
+  const MessageInfo &infoData = m_vecData.at(index.row());
+
+  switch (index.column())
+  {
+  case TIME:
+    return infoData.time.toString();
+  case DIRECTION:
+    return infoData.direction;
+  case TYPE:
+    return infoData.type;
+  case UUID:
+    return infoData.uuid;
+  case DATA:
+  {
+    if (!infoData.data.size())
+      return infoData.data;
+
+    QJsonObject obj = QJsonDocument::fromJson(infoData.data.toLatin1()).object();
+    QString result = infoData.data;
+    const QStringList keys = obj.keys();
+
+    for (const QString &currentKey : keys)
+    {
+      const QJsonValue subObj = obj.value(currentKey);
+      if (subObj.isArray())
+        result.prepend(QStringLiteral("%1 size: %2\n").arg(currentKey).arg(subObj.toArray().size()));
+    }
+
+    return result;
+  }
+  }
+
+  return QVariant();
+}
+
+QString MessageModel::toString(MessageModel::MessageDirection direction) const
+{
+  switch (direction)
+  {
+  case TO_PROXY:
+    return tr(" > to Proxy");
+  case FROM_PROXY:
+    return tr(" < from Proxy");
+  default:
+    return QString();
+  }
+}