20260713 unify installer scripts and RTR registration

scripts/docker/build_docker_installer_package.sh

@@ -437,7 +437,12 @@ cross_arch_default: deny
 cross_arch_enable_var: ALLOW_CROSS_ARCH
 EOF
 
-chmod +x "$stage"/*.sh "$stage/scripts"/*.sh
+chmod +x "$stage/scripts"/*.sh
+
+if find "$stage" -maxdepth 1 -type f -name '*.sh' -print -quit | grep -q .; then
+  echo "error: operational scripts must be installed under scripts/ only" >&2
+  exit 1
+fi
 tar -C "$OUT_DIR" -czf "$tar_path" "$package_name"
 package_sha256="$(sha256sum "$tar_path" | awk '{print $1}')"
 rm -rf "$monitor_image_stage"