Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

.gitignore

@@ -9,3 +9,21 @@ fix_qt6_gui_deps.py
 fix_rti_conditionals.py
 fix_target_checks.py
 build
+__pycache__/
+add_logger_bootstrap_include.py
+aqtinstall.log
+ces_fix.py
+ces_pass2.py
+fix_additem_enum.py
+fix_broken_includes.py
+fix_enum_as_int.py
+fix_enums.py
+fix_logger_init.py
+fix_logger_remnant.py
+fix_members.py
+fix_mlogger.py
+fix_pdm_combo.py
+fix_sco.py
+restore_underlying.py
+../../restore_ppm_dtc.py
+*.py