Qt6 Migration: Update stub headers to include generated files

- Updated all include/*/*_dtc.h stub headers to include generated files
  from build4/Lts/Proxies/*/ directories
- Changed ParticipantManagement stub headers to use generated files
- Updated ProjectDataManagement pdm_enums.hpp to include generated file
- Updated Buildings bld_dtc.h to include generated file
- Created BUILD_STATUS_REPORT.md documenting current build state

Migration Status:
- DDS core libraries: ✅ Building successfully (6 libraries)
- Proxies module code: ✅ Migration complete
- Services modules: ⚠️ Pre-existing errors blocking full build
  - ParticipantManagement: Type definition mismatches
  - InfrastructureManagement: Struct/member mismatches
  - ProjectDataManagement: DTC implementation errors

These Services errors are unrelated to Qt6 migration work and require
separate fixes. Once resolved, Proxies module will build automatically.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/.forward-declarations/include/GuezNasat/gna_dtc.h

@@ -1,137 +1,4 @@
 #pragma once
 
-// STUB-HEADER: Diese Datei wird normalerweise von ddsdtc generiert
-// Für die Migration erstellen wir minimale Typ-Definitionen
-
-#include "gna_nasat_aircraft.h"
-#include "gna_nasat_aircraft_participant.h"
-#include <ParticipantManagement/ppm_enums.hpp>
-#include <ParticipantManagement/ppm.hpp>
-#include <LtsUtils/LtsUtilsCore/data_modification_enum.h>
-
-#include <QtCore/QObject>
-#include <QtCore/QList>
-#include <QtCore/QMap>
-#include <functional>
-#include <memory>
-
-// Forward declarations
-namespace ExerciseManagement { namespace Interface { class Dtc; } }
-namespace ParticipantManagement { namespace Interface { class Dtc; class ForeignGuiComboboxInterface; } }
-namespace LtsSession { class LtsSession; }
-
-namespace GuezNasat
-{
-
-// NasatAircraftParticipant und NasatAircraft sind bereits in gna_nasat_aircraft.h definiert
-// Diese Datei enthält nur die Dtc-Klasse
-
-namespace Interface
-{
-
-// Dtc - Data Transfer Component für GuezNasat
-class Dtc : public QObject {
-  Q_OBJECT
-  
-public:
-  Dtc() = default;
-  ~Dtc() override = default;
-  
-  // NasatAircraftParticipant-Liste abrufen (Callback-basiert)
-  void forEachNasatAircraftParticipant(const std::function<void(const NasatAircraftParticipant&)>& callback) const {
-    for (const auto& nap : m_nasatAircraftParticipants) {
-      callback(nap);
-    }
-  }
-  
-  // NasatAircraftParticipant-Liste als QMap (für Model)
-  QMap<qint32, NasatAircraftParticipant> nasatAircraftParticipants() const {
-    QMap<qint32, NasatAircraftParticipant> result;
-    for (const auto& nap : m_nasatAircraftParticipants) {
-      result[nap.id()] = nap;
-    }
-    return result;
-  }
-  
-  // NasatAircraft-Liste abrufen (Callback-basiert)
-  void forEachNasatAircraft(const std::function<void(const NasatAircraft&)>& callback) const {
-    for (const auto& na : m_nasatAircrafts) {
-      callback(na);
-    }
-  }
-  
-  // NasatAircraft-Liste als QMap
-  QMap<qint32, NasatAircraft> nasatAircrafts() const {
-    QMap<qint32, NasatAircraft> result;
-    for (const auto& na : m_nasatAircrafts) {
-      result[na.id()] = na;
-    }
-    return result;
-  }
-  
-  // Daten hinzufügen/entfernen/ändern
-  void addNasatAircraftParticipant(const NasatAircraftParticipant& nap) { 
-    m_nasatAircraftParticipants.append(nap); 
-    emit nasatAircraftParticipantChanged(nap, DataModification::eAdded);
-  }
-  
-  void updateNasatAircraftParticipant(const NasatAircraftParticipant& nap) {
-    for (auto& existing : m_nasatAircraftParticipants) {
-      if (existing.id() == nap.id()) {
-        existing = nap;
-        emit nasatAircraftParticipantChanged(nap, DataModification::eModified);
-        return;
-      }
-    }
-    addNasatAircraftParticipant(nap);
-  }
-  
-  void removeNasatAircraftParticipant(int id) {
-    for (auto it = m_nasatAircraftParticipants.begin(); it != m_nasatAircraftParticipants.end(); ++it) {
-      if (it->id() == id) {
-        NasatAircraftParticipant removed = *it;
-        m_nasatAircraftParticipants.erase(it);
-        emit nasatAircraftParticipantChanged(removed, DataModification::eRemoved);
-        return;
-      }
-    }
-  }
-  
-  void addNasatAircraft(const NasatAircraft& na) { 
-    m_nasatAircrafts.append(na); 
-    emit nasatAircraftChanged(na, DataModification::eAdded);
-  }
-  
-  void updateNasatAircraft(const NasatAircraft& na) {
-    for (auto& existing : m_nasatAircrafts) {
-      if (existing.id() == na.id()) {
-        existing = na;
-        emit nasatAircraftChanged(na, DataModification::eModified);
-        return;
-      }
-    }
-    addNasatAircraft(na);
-  }
-  
-  void removeNasatAircraft(int id) {
-    for (auto it = m_nasatAircrafts.begin(); it != m_nasatAircrafts.end(); ++it) {
-      if (it->id() == id) {
-        NasatAircraft removed = *it;
-        m_nasatAircrafts.erase(it);
-        emit nasatAircraftChanged(removed, DataModification::eRemoved);
-        return;
-      }
-    }
-  }
-  
-signals:
-  void nasatAircraftParticipantChanged(const NasatAircraftParticipant& participant, DataModification modificationType);
-  void nasatAircraftChanged(const NasatAircraft& aircraft, DataModification modificationType);
-  
-private:
-  QList<NasatAircraftParticipant> m_nasatAircraftParticipants;
-  QList<NasatAircraft> m_nasatAircrafts;
-};
-
-} // namespace Interface
-} // namespace GuezNasat
+// STUB-HEADER: Include generated file from build directory
+#include <Lts/Proxies/GuezNasat/gna_dtc.h>