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/Services/ServiceManagement/WebSocketInterface/data_manager.cpp

@@ -0,0 +1,80 @@
+/**
+  * @RDE_HEADER@
+  * The DataManager class takes strucure element data from the HandlerStructureElement,
+  * offers an interface to get and set structure data
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Philipp Dassow, SLST, 2017-12-05
+  */
+#include "WebSocketInterface/data_manager.h"
+
+#include "main_handler.h"
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QMap>
+#include <QVector>
+
+namespace ServiceManagement
+{
+namespace WebSocketInterface
+{
+
+//---------------------------------------------------------------------------------------------------------
+DataManager::DataManager(MainHandler *mainHandler)
+  : m_mainHandler(mainHandler)
+  , m_logger(getLogger(QStringLiteral("DataManager")))
+{
+}
+
+//---------------------------------------------------------------------------------------------------------
+bool DataManager::init()
+{
+  m_groupHandler = m_mainHandler->groupHandler();
+
+  return true;
+}
+
+//---------------------------------------------------------------------------------------------------------
+LtsWebSocket::ReplyMessage *DataManager::servicesInformation(const QString &uuid) const
+{
+  using namespace Messages;
+
+  const QVector<Group *> groups = m_groupHandler->groups();
+  QVector<ServicePortsInformationMessage::ExerciseInformation> data;
+  data.reserve(groups.size());
+  for (auto group : groups)
+  {
+    const QMap<int, ServiceProcess *> serviceProcs = group->serviceProcs();
+    ServicePortsInformationMessage::ExerciseInformation exerciseInfo;
+
+    for (ServiceProcess *service : serviceProcs)
+    {
+      if (service->ports().is_set())
+      {
+        ServicePortsInformationMessage::ServiceInformation serviceInfo;
+        serviceInfo.name = service->serviceName();
+        serviceInfo.abbreviation = service->abbreviation();
+
+        const auto ports = service->ports().get();
+        for (const auto &port : ports)
+          serviceInfo.ports.append(ServicePortsInformationMessage::PortInformation({port.number(), port.type().underlying(), QString::fromStdString(port.properties())}));
+
+        exerciseInfo.services.append(serviceInfo);
+      }
+    }
+
+    if (!exerciseInfo.services.isEmpty())
+    {
+      exerciseInfo.exerciseId = group->exercisePartitionId();
+      exerciseInfo.replayPartitionId = group->replayPartitionId();
+      data.append(exerciseInfo);
+    }
+  }
+
+  return new ServicePortsInformationMessage(data, uuid);
+}
+
+} // namespace WebSocketInterface
+} // namespace ServiceManagement