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/AudioVideoManagement/mounting_point.cpp

@@ -0,0 +1,56 @@
+/**
+  * @RDE_HEADER@
+  * MountingPoint
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Fröbel, SLSE, 2017-11-30
+  */
+
+#include "mounting_point.h"
+#include <InfrastructureManagement/ism.hpp>
+#include <QtGlobal>
+
+namespace AudioVideoManagement
+{
+
+MountingPoint::MountingPoint(const InfrastructureManagement::StructureElement &mountingPoint)
+: m_data(new InfrastructureManagement::StructureElement(mountingPoint))
+{
+  Q_ASSERT(mountingPoint.id() > 0);
+}
+
+MountingPoint::~MountingPoint() = default;
+
+void MountingPoint::update(const InfrastructureManagement::StructureElement &data)
+{
+  if (*m_data == data)
+    return;
+
+  *m_data = data;
+  emit changed(this);
+}
+
+Asset *MountingPoint::asset() const
+{
+  Q_ASSERT(m_asset);
+  return m_asset;
+}
+
+void MountingPoint::mount2(Asset *asset)
+{
+  Q_ASSERT(!m_asset);
+  Q_ASSERT(asset);
+  m_asset = asset;
+}
+
+void MountingPoint::unmount2(Asset *asset)
+{
+  Q_ASSERT(m_asset);
+  Q_ASSERT(asset == m_asset);
+  m_asset = nullptr;
+  return;
+}
+
+} // namespace AudioVideoManagement
+