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/ExerciseEventManagement/eem.hpp

@@ -0,0 +1,10 @@
+#pragma once
+
+// Convenience header for ExerciseEventManagement
+// Includes all common types and enums
+
+#include <ExerciseEventManagement/eem_enums.hpp>
+#include <ExerciseEventManagement/eem_dtc.h>
+#include <ExerciseEventManagement/eem_types.h>
+
+// Additional forward declarations and common types can be added here