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/DBUpdate/exercises_model.h

@@ -0,0 +1,93 @@
+/**
+  * @RDE_HEADER@
+  * DBUpdate - Exercises updates model
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Iuliana Ojog, 2021-02-17
+  */
+
+#pragma once
+
+#include "logger.h"
+
+#include <QAbstractTableModel>
+#include <QSortFilterProxyModel>
+#include <QSqlDatabase>
+
+namespace DBUpdate
+{
+  struct ExerciseUpdate
+  {
+    qint32 id = 0;
+    QString name;
+    qint64 startTime = 0;
+    qint64 endTime = 0;
+    qint32 stateId = 0;
+    QString schema;
+    QString version = QStringLiteral("0.000");
+    QString description = QStringLiteral("no available information");
+    qint64 updated = 0;
+    bool isChecked = false;
+  };
+
+class  ExercisesModel : public QAbstractTableModel
+{
+  Q_OBJECT
+
+public:
+  enum Columns
+  {
+    Id = 0,
+    Schema,
+    Name,
+    StartTime,
+    EndTime,
+    StateId,
+    Version,
+    Description,
+    Updated
+  };
+
+  explicit ExercisesModel(QObject *parent = nullptr);
+  ~ExercisesModel();
+
+  bool initModel(const QSqlDatabase &db, const QString &version = QStringLiteral("0.00"), const QStringList &schemas = {});
+
+  QVariant data(const QModelIndex &, int) const override final;
+  Qt::ItemFlags flags(const QModelIndex &index) const override final;
+  bool setData(const QModelIndex &index, const QVariant &value, int role) override final;
+
+  int rowCount(const QModelIndex &parent) const override final;
+  int columnCount(const QModelIndex &parent) const override final;
+  QVariant headerData(int section, Qt::Orientation orientation, int role) const override final;
+  ExerciseUpdate getRowData(int row) const;
+  bool insertRow(const ExerciseUpdate &item);
+
+  QString toString(int stateId) const;
+
+  QStringList getSchemasToUpdate();
+  const QString getLastUpdate() { return m_lastUpdate; }
+
+  friend class ExercisesProxyModel;
+protected:
+
+private:
+  QString m_lastUpdate = QStringLiteral("0.00");
+  QVector<ExerciseUpdate> m_vecData;
+  LOGGER_T m_logger;
+};
+
+class ExercisesProxyModel final : public QSortFilterProxyModel
+{
+  Q_OBJECT
+public:
+  using QSortFilterProxyModel::QSortFilterProxyModel;
+  void setSourceModel(QAbstractItemModel *sourceModel) override;
+protected:
+  bool lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const override;
+private:
+  ExercisesModel *m_sourceModel = nullptr;
+};
+
+}