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/ParticipantManagement/ppm.hpp

@@ -2,7 +2,7 @@
 // STUB-HEADER: Diese Datei wird normalerweise von DDS generiert
 // Für die Migration erstellen wir minimale Typ-Definitionen
 
-#include "ppm_enums.hpp"
+#include <ParticipantManagement/ppm_enums.hpp>
 
 #include <QtCore/QObject>
 #include <QtCore/QString>

qt6-after/qt6-migrated-legatus/.forward-declarations/include/ParticipantManagement/ppm_types.h

@@ -5,7 +5,7 @@
 
 #include <QtCore/QString>
 #include <ostream>
-#include "ppm_enums.hpp"
+#include <ParticipantManagement/ppm_enums.hpp>
 
 namespace ParticipantManagement
 {
@@ -15,7 +15,7 @@ struct Type
 {
     int id = 0;
     QString name;
-    TypeClass typeClass = TypeClass::Unknown;
+    TypeClass typeClass = TypeClass::eUninitialized;
     // Weitere Felder werden bei Bedarf ergänzt
 };