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/RecordingManagement/rec_db_impl.h

@@ -0,0 +1,41 @@
+/**
+  * @RDE_HEADER@
+  * Stub header for CODEGEN_DATABASE generated code (BUILD_RTI=OFF)
+  * This file is generated by CODEGEN_DATABASE macro when BUILD_RTI=ON
+  * For BUILD_RTI=OFF builds, this stub provides the minimal interface
+  */
+#pragma once
+
+#include <QObject>
+
+namespace Database
+{
+// Stub struct for RecSnapshot
+struct RecSnapshot
+{
+  qint64 id = 0;
+  // Add other fields as needed
+};
+} // namespace Database
+
+namespace RecordingManagement
+{
+
+/**
+ * @brief Base class for database interface implementation
+ * 
+ * This class is normally generated by CODEGEN_DATABASE macro.
+ * This stub provides minimal interface for BUILD_RTI=OFF builds.
+ */
+class DatabaseInterfaceImpl : public QObject
+{
+  Q_OBJECT
+public:
+  explicit DatabaseInterfaceImpl(QObject *parent = nullptr) : QObject(parent) {}
+  virtual ~DatabaseInterfaceImpl() = default;
+
+  // Virtual methods that can be overridden by custom implementations
+  virtual bool removeNewerEqual(const Database::RecSnapshot &data) = 0;
+};
+
+} // namespace RecordingManagement