Merge feature/lts-viewer-validation-testing-phase into feature/qt6-migration-basis-modules-merge

Resolves 1 conflict (new_docker_build.sh, union of viewer-only + codification options); folds in fixes for pre-existing defects surfaced by the validation runs (KDReports-qt6 wiring, LtsSession RTI linking, LtsFileDialog/WLS/BSM Qt6/RTI API migration, GROUP4 target list, new --cmake_build_flags option); validated with BUILD_RTI=ON BUILD_GRANTLEE=ON in 3 Docker runs (run 3: build green, 6 base-state first-run CTest failures documented).

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

@@ -38,12 +38,12 @@ struct DdsConnectionParams
 
   DdsConnectionParams() = default;
   explicit DdsConnectionParams(const Core::ReplayPartition &rp)
-    : domainId(rp.domainId())
-    , partitionId(rp.id())
-    , exerciseId(rp.exerciseId())
+    : domainId(rp.domainId)
+    , partitionId(rp.id)
+    , exerciseId(rp.exerciseId)
     , partitionType(IDL::PartitionType::Replay)
   {
-    setTcpConnectionUrl(rp.tcpConnectionUrl());
+    setTcpConnectionUrl(rp.tcpConnectionUrl);
   }
 
   bool isValid() const { return domainId >= 0 && partitionType != IDL::PartitionType::Any; }