deploy.sh: image check no longer fails at random (grep -q + pipefail)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/deploy.sh

@@ -73,7 +73,9 @@ case "$(remote 'uname -m')" in
   x86_64) arch=amd64 ;; aarch64|arm64) arch=arm64 ;; *) arch="" ;;
 esac
 if [[ -n "$arch" ]]; then
-  docker buildx imagetools inspect "$REGISTRY:$tag" 2>/dev/null | grep -q "Platform:.*linux/$arch" \
+  # Captured first: `inspect | grep -q` fails under pipefail when grep exits early (SIGPIPE).
+  manifests=$(docker buildx imagetools inspect "$REGISTRY:$tag" 2>/dev/null || true)
+  grep -q "Platform:.*linux/$arch" <<<"$manifests" \
     || fail "$REGISTRY:$tag has no linux/$arch image – run scripts/release.sh first"
 fi
 echo "deploying $tag (running: ${current:-unknown}, target linux/${arch:-?})"