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/ExerciseManagement/handler_exercise_phase.h

@@ -0,0 +1,54 @@
+/**
+  * @RDE_HEADER@
+  * Handler for all exercise phase objects
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * created by Philipp Dassow, SLEA, 2017-04-06
+  */
+#pragma once
+
+#include <QMap>
+
+#include "logger.h"
+#include "exm_fts.h"
+
+namespace ExerciseManagement
+{
+
+class DdsHandler;
+class DatabaseInterface;
+class MainHandler;
+class ObjectExercisePhase;
+class HandlerExercisePhase final
+    : protected Interface::Fts::ExercisePhaseCreateRequestHandler
+    , protected Interface::Fts::ExercisePhaseModifyRequestHandler
+    , protected Interface::Fts::ExercisePhaseRemoveRequestHandler
+{
+public:
+  HandlerExercisePhase(MainHandler *mainHandler,
+                       const std::shared_ptr<DdsHandler> &ddsHandler,
+                       const std::shared_ptr<DatabaseInterface> &db);
+  ~HandlerExercisePhase();
+
+  bool init();
+  Core::FunctionReplyObject exercisePhaseCreateRequest(const ExercisePhaseCreateRequest &request);
+  Core::FunctionReplyObject removeAllPhasesByExerciseId(qint64 exerciseId);
+
+private:
+  void onExercisePhaseCreateRequest(const rti::core::SampleIdentity &cookie,
+                                    const ExercisePhaseCreateRequest &request) override final;
+  void onExercisePhaseModifyRequest(const rti::core::SampleIdentity &cookie,
+                                    const ExercisePhaseModifyRequest &request) override final;
+  void onExercisePhaseRemoveRequest(const rti::core::SampleIdentity &cookie,
+                                    const Core::RemoveElementRequest &request) override final;
+
+private:
+  QMap<int, ObjectExercisePhase *> m_exercisePhaseObjMap;
+  MainHandler                     *m_mainHandler;
+  std::shared_ptr<DdsHandler>      m_ddsHandler;
+  std::shared_ptr<DatabaseInterface> m_db;
+  NGL::INGLLogger                 &m_logger;
+};
+
+} // namespace ExerciseManagement