Qt6/RTI 7.7 Migration: Build-System und RTI-Integration fixes

CMake Build-System:
- NGL_ADD_SUBDIR_GUARDED() vor erstem Aufruf definiert (Zeile 38)
- Z/src wird VOR ENABLE_TESTING() eingebunden
- InfrastructureManagement an Anfang von Lts/Services CMakeLists.txt
- ALIAS Targets für RTI nur für existierende Libraries erstellt

RTI 7.7 Integration:
- generic_base.h: QMetaMethod Include hinzugefügt
- generic_data_reader.h: Template-Signatur auf 2 Parameter angepasst
  - detail::DataReaderImpl<Q> als Default-Template-Parameter

Qt6 Location Support:
- Dockerfile: qtlocation und qtpositioning Module hinzugefügt

Dokumentation:
- C++23 Inkompatibilität mit RTI 7.7 in copilot-instructions.md
- EXTERNAL_DEPENDENCIES.md Strategie dokumentiert

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

qt6-after/qt6-migrated-legatus/include/DDS/Generic/generic_base.h

@@ -5,10 +5,10 @@
 
 #include <string>
 #include <ddsgen_export.h>
+#include <QMetaMethod>
 
 // Forward declarations for Qt types used in getMethod
 class QObject;
-class QMetaMethod;
 
 // Forward declaration for NGL logger
 namespace NGL {

qt6-after/qt6-migrated-legatus/include/DDS/Generic/generic_data_reader.h

@@ -9,16 +9,28 @@
  */
 
 #ifdef BUILD_RTI
-// RTI DDS is available - include the real implementation
-#include <Lts/DDS/Generic/generic_data_reader.h>
+// RTI DDS is available - include the real implementation from RTI headers
+// DataReader is already defined in <dds/sub/subfwd.hpp> with signature:
+// template <typename T, template <typename Q> class DELEGATE = dds::sub::detail::DataReaderImpl>
+// class DataReader;
 #else
 // BUILD_RTI=OFF: Provide minimal stub definitions
 
 namespace dds {
 namespace sub {
+namespace detail {
+
+// Dummy delegate class to serve as default template parameter
+template<typename Q>
+class DataReaderImpl {
+    // Empty stub implementation
+};
+
+} // namespace detail
 
 // Forward declaration stub for DataReader
-template<typename T>
+// Must match RTI 7.7 signature for compatibility
+template<typename T, template <typename Q> class DELEGATE = detail::DataReaderImpl>
 class DataReader {
 public:
     // Minimal stub interface - add methods as needed by the codebase

qt6-after/qt6-migrated-legatus/include/FileManagement/flm_db.h

@@ -91,7 +91,7 @@ public:
       , m_exerciseId(std::nullopt)
       , m_phaseId(std::nullopt)
       , m_size(0)
-      , m_fileStatus(FileStatus_Valid)
+      , m_fileStatus(FileStatus::Valid)
       , m_fileCategory(FileCategory::Global)
       , m_fileType(FileType::Unknown)
       , m_isTemplate(false)
@@ -121,7 +121,7 @@ public:
   FileCategory fileCategory() const { return m_fileCategory; }
   FileType fileType() const { return m_fileType; }
   bool isTemplate() const { return m_isTemplate; }
-  bool isDeleted() const { return m_fileStatus == FileStatus_Deleted; }
+  bool isDeleted() const { return m_fileStatus == FileStatus::Deleted; }
   bool isHidden() const { return m_hidden; }
   bool isUsedBy() const { return m_used; }
   std::string usedBy() const { return m_usedBy; }