BUILD_RTI conditional fixes and Qt6 API updates

- cmake/FindRTI.cmake: Add INTERFACE placeholder targets when RTI not found
- cmake/FindRTI.cmake: Force BUILD_RTI=OFF when RTI not installed
- Lts/Common/LtsSession/CMakeLists.txt: Make LtsSessionDataDds conditional on BUILD_RTI
- Lts/Viewer/CMakeLists.txt: Make LtsDataView conditional on BUILD_RTI
- Lts/Plugins/*/CMakeLists.txt: 97 plugin files wrapped in BUILD_RTI conditionals
- cmake/NGLMacros.cmake: Fix NGL_ADD_BIG_RESOURCES macro (removed premature return())
- Multiple Qt6 API fixes: QLinkedList→std::list, QStringRef→QStringView, etc.
- BUILD_RTI_FIXES_SUMMARY.md: Comprehensive documentation of all fixes

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

qt6-after/qt6-migrated-legatus/Lts/Common/LtsSession/lts_session_data_dds.cpp

@@ -1,5 +1,12 @@
-
-
+/**
+ * @RDE_HEADER@
+ * DDS specific parts for a session
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ *
+ * Created by Christian Ehrlicher, SLSE, 2017-02-27
+ */
 
 #include "lts_session_data_dds.h"
 #include <DDS/DDSConnector/dds_connector.h>
@@ -12,12 +19,15 @@
 
 namespace LtsSession
 {
+/**
+ * We have to make sure that only one DdsConnector for a specific domain/partion/tye/connStr
+ * exists because we don't want to have more than one DomainParticipant and Publisher/Subscriber
+ * per domain/partion/tye/connStr. Therefore this ugly-looking key
+ */
 
-
-
-
-
-
+//
+// DdsConnectionContainer
+//
 class DdsConnectionContainer
 {
   struct DdsConnection : public DdsConnectionParams
@@ -42,7 +52,7 @@ public:
       auto ret = conn.ddsConnector.lock();
       if (ret != nullptr)
         return ret;
-      
+      // ddsConnector is a nullptr -> useless -> remove
       ddsConnections.removeAt(i);
     }
     Q_ASSERT(false);
@@ -59,7 +69,7 @@ public:
       auto ret = conn.ddsConnector.lock();
       if (ret != nullptr)
         return ret;
-      
+      // ddsConnector is a nullptr -> useless -> remove
       ddsConnections.removeAt(i);
     }
     return std::shared_ptr<DDSConnector::DdsConnector>();
@@ -75,7 +85,7 @@ public:
       auto ret = conn.ddsConnector.lock();
       if (ret != nullptr)
         return ret->getDomainParticipant();
-      
+      // ddsConnector is a nullptr -> useless -> remove
       ddsConnections.removeAt(i);
     }
     return nullptr;
@@ -173,9 +183,9 @@ Q_GLOBAL_STATIC(DataPluginContainer, s_dataPlugins)
 
 
 
-
-
-
+//
+// LtsSessionDataDds
+//
 LtsSessionDataDds::LtsSessionDataDds(QObject *parent)
   : QObject(parent)
   , m_exerciseId(-1)
@@ -201,7 +211,7 @@ bool LtsSessionDataDds::init(const DdsConnectionParams &connParams)
   m_qosFileList = QStringList(connParams.qos_file);
   if (m_ddsConnector == nullptr)
   {
-    
+    // maybe we can at least find a useful DomainParticipant?
     dds::domain::DomainParticipant dp = s_ddsConnections->findMatchingDomainParticipant(connParams);
     if (dp != nullptr)
       return init(dp, connParams);
@@ -214,7 +224,7 @@ bool LtsSessionDataDds::init(const DdsConnectionParams &connParams)
     m_ddsConnector = std::make_shared<DDSConnector::DdsConnector>(connParams.domainId,
                                                                   connParams.partitionType,
                                                                   connParams.partitionId,
-                                                                  connParams.exerciseId, 
+                                                                  connParams.exerciseId, //same as partition Id in live but not in replay
                                                                   type);
     s_ddsConnections()->insertConnection(connParams, m_ddsConnector);
   }
@@ -341,7 +351,7 @@ bool LtsSessionDataDds::initInternal()
 {
   if (!m_ddsConnector || !m_ddsConnector->init(m_qosFileList))
   {
-    ERROR_LOG() << "DDS connector could not be initialized - session aborted!";
+    ERROR_LOG(m_logger) << "DDS connector could not be initialized - session aborted!";
     m_ddsConnector = nullptr;
     return false;
   }
@@ -386,4 +396,4 @@ void LtsSessionDataDds::addAvailablaeDataPluginInterfaces(const QMap<QString, st
                                    dataPlugins);
 }
 
-} 
+} // namespace LtsSession