Qt6 migration verification: RTI 7.7 Pro integration and path fixes

Major changes:
- Merged branches: feature/arcgis300-symbology-migration, feature/lts-viewer-validation-testing-phase, bugfix/fix-warning-issue
- Integrated RTI 7.7 Pro commercial library with proper CMake configuration
- Fixed all hardcoded /workspace paths to use /repo (Docker mount point)
- Added DOCKER_MOUNT_ROOT parameter to new_docker_build.sh for configurable mount points
- Fixed RPATH configuration for proper runtime library loading

Technical fixes:
- cmake/FindRTI.cmake: Set CMP0111 policy unconditionally, fixed IMPORTED_LOCATION property setting outside target creation block, added debug logging
- CMakeLists.txt: Added CMP0111 before find_package(RTI), updated path detection for /repo, configured RPATH
- Lts/DDS/CMakeLists.txt: Reordered DdsUnitTests before DdsUnitTestsPlaceholder to fix test executable naming
- ArcGIS symbology: Removed deprecated m_sssResult and m_esriSwatchTaskUuid members (ArcGIS 300 API changes)

Build verification:
- 10 CPU build: 100% success (error fixing phase)
- 1 CPU build: 100% success (final validation)
- CTest: 675 tests run, 97% pass rate (654/675 passed)
- RTI DDS integration test: PASSED

Known issues:
- 21 tests failed (mostly 'Not Run' for missing smoke test executables)
- Timeout issues in bld_bsm_test and taboc_serialtest (connection refused errors)

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

qt6-after/qt6-migrated-legatus/cmake/FindRTI.cmake

@@ -80,7 +80,7 @@ IF(NOT RTI_DIR OR RTI_DIR STREQUAL "")
     SET(_RTI_DIR $ENV{DDS_PATH})
     IF(NOT _RTI_DIR)
       # Try local external directory first (check multiple levels for different repo structures)
-      # Check container path first (/workspace/external), then host-relative paths
+      # Check container path first (${DOCKER_MOUNT_ROOT}/external, default /repo), then host-relative paths
       IF(EXISTS "${CMAKE_SOURCE_DIR}/external/rti_connext_dds-7.7.0")
         SET(_RTI_DIR "${CMAKE_SOURCE_DIR}/external/rti_connext_dds-7.7.0")
       ELSEIF(EXISTS "${CMAKE_SOURCE_DIR}/../external/rti_connext_dds-7.7.0")