feat: add isolated Linux shadow backend

product-source/hololake-platform/guanghu-os/world-seed/scripts/run-guanghu-native-quality-gate.sh

@@ -88,6 +88,8 @@ run_gate world_and_protocol_validation \
 run_gate shell_syntax bash -c \
   'for script in "$1"/scripts/*.sh "$1"/world-seed/scripts/*.sh; do bash -n "$script"; done' \
   _ "${source_root}"
+run_gate linux_subcontrol_docker_backend \
+  "${source_root}/scripts/test-linux-subcontrol-docker-backend.sh"
 run_gate auditable_line_coverage_100_percent \
   bash -c '
     cargo llvm-cov clean --workspace --manifest-path "$1/Cargo.toml"