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/Common/LtsTimelineClassic/AbstractTimelineModel.h

@@ -0,0 +1,158 @@
+/**
+  * @RDE_HEADER@
+  * MVC model
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Mike Wille, SLSE, 2014-10-01
+  */
+
+#pragma once
+
+#include "Event.h"
+#include "Item.h"
+#include <LtsTimelineClassic/ltstimelineclassic_export.h>
+
+#include <QAbstractItemModel>
+#include <NGLLogger/INGLLogger.h>
+
+
+namespace LtsTimelineClassic
+{
+
+/**
+ * @brief MVC model
+ */
+class LTSTIMELINECLASSIC_EXPORT AbstractTimelineModel : public QAbstractItemModel
+{
+  Q_OBJECT
+
+public:
+  explicit AbstractTimelineModel(/*bool getEventListsRecursive = true,*/ QObject *parent = nullptr);
+  ~AbstractTimelineModel();
+
+  void retranslate();
+
+  /**
+     * @brief returns the root item
+     * @return root item
+     */
+  Item *getRootItem();
+
+  Event *getEvent(int uniqueId); // WARNING: unique ids are not unique between events and markers.... grrr
+
+  //void invalidateItemForEvent(int uniqueId);
+  void invalidateTimeline();
+
+  /**
+     * @brief refreshes the model data, which triggers all views to refresh also
+     */
+  void refreshData();
+
+  qint64 highestPositionedItem() const { return m_highestPositionedItem; }
+  qint64 lowestPositionedItem() const { return m_lowestPositionedItem; }
+
+
+protected:
+  NGL::INGLLogger &m_logger;
+
+
+protected:
+  /**
+     * @brief adds an event to the model
+     * @param event event to add to item
+     */
+  void addEvent(Event *event);
+
+  /**
+     * @brief returns coherant data of row & column for the view
+     * @param index row & column
+     * @param role what kind of data is needed by the view
+     * @return variable data
+     */
+  QVariant data(const QModelIndex &index, int role) const;
+
+  /**
+     * @brief flags of the coherant data of row & column has (what is allowed, what is not)
+     * @param index row & column
+     * @return flags
+     */
+  Qt::ItemFlags flags(const QModelIndex &index) const;
+
+  /**
+     * @brief returns the header text for the coherant column
+     * @param section column
+     * @param orientation use Qt::Horizontal
+     * @param role what kind of data is needed by the view
+     * @return variable data
+     */
+  QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
+
+  /**
+     * @brief
+     * @param index
+     * @return
+     */
+  Item *itemFromIndex(const QModelIndex &idx) const;
+
+  /**
+     * @brief model internal method
+     * @param row
+     * @param column
+     * @param parent
+     * @return
+     */
+  QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
+
+  /**
+     * @brief model internal method
+     * @param index
+     * @return
+     */
+  QModelIndex parent(const QModelIndex &index) const;
+
+  /**
+     * @brief model internal method
+     * @param parent
+     * @return
+     */
+  int rowCount(const QModelIndex &parent = QModelIndex()) const;
+
+  /**
+     * @brief model internal method
+     * @param parent
+     * @return
+     */
+  int columnCount(const QModelIndex &parent = QModelIndex()) const;
+
+
+  virtual qint64 currentTime() const = 0;
+
+  //ItemList m_itemList; NO: m_rootItem has children [a item list huh] // to keep scope to all items - especially for the EventFactory which can now add to all events
+  qint64 m_highestPositionedItem;
+  qint64 m_lowestPositionedItem;
+  bool   m_getEventListsRecursive;
+  Item  *m_rootItem;
+  Item  *m_markersItem; // NOTE: autodeleted by m_rootItem on its deletion
+
+
+signals:
+  /**
+     * @brief signals when event is right-clicked (was triggered by ActiveEvent)
+     * @param position position of the mouse when right-clicked
+     * @param affectedEvent event that was right-clicked
+     */
+  void signalContextMenu(const QPoint &position, Event *affectedEvent);
+
+  /**
+     * @brief signals that an event has been clicked (for use with standard-action) (was triggered by ActiveEvent)
+     * @param affectedEvent event that was clicked
+     */
+  void signalClicked(Event *affectedEvent);
+
+
+  void signalToolTip(const QPoint &p, Event *e);
+
+};
+
+} // namespace LtsTimelineClassic