Merge feature/qt6-migration-basis-modules-services into feature/qt6-migration-basis-modules

Resolves 17 conflicts against legacy Qt5 semantics; validates with BUILD_RTI=ON BUILD_GRANTLEE=ON.

qt6-after/qt6-migrated-legatus/.forward-declarations/include/Buildings/bld_dtc.h

@@ -0,0 +1,13 @@
+#pragma once
+
+// STUB-HEADER: Diese Datei wird normalerweise von ddsdtc generiert
+// Für die Migration erstellen wir minimale Forward-Declarations
+
+namespace Buildings
+{
+namespace Interface
+{
+class Dtc;
+class Ftc;
+} // namespace Interface
+} // namespace Buildings

qt6-after/qt6-migrated-legatus/.forward-declarations/include/Buildings/bld_enums.hpp.stub

@@ -0,0 +1,30 @@
+// Stub file for bld_enums.hpp - used when BUILD_RTI=OFF
+#ifndef BLD_ENUMS_HPP
+#define BLD_ENUMS_HPP
+
+#include <cstdint>
+
+namespace Buildings {
+
+enum class BuildingType : std::int32_t {
+    Residential = 0,
+    Commercial = 1,
+    Industrial = 2
+};
+
+enum class BuildingStatus : std::int32_t {
+    Active = 0,
+    Inactive = 1,
+    UnderConstruction = 2
+};
+
+struct BuildingInfo {
+    int id = 0;
+    double x = 0.0;
+    double y = 0.0;
+    double z = 0.0;
+};
+
+} // namespace Buildings
+
+#endif // BLD_ENUMS_HPP