ci(crabbox): harden docker hydration

.github/workflows/crabbox-hydrate.yml

@@ -31,6 +31,10 @@ permissions:
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+  PNPM_CONFIG_CHILD_CONCURRENCY: "1"
+  PNPM_CONFIG_MODULES_DIR: "/tmp/openclaw-pnpm-node-modules"
+  PNPM_CONFIG_NETWORK_CONCURRENCY: "1"
+  PNPM_CONFIG_VIRTUAL_STORE_DIR: "/tmp/openclaw-pnpm-virtual-store"
 
 jobs:
   hydrate:
@@ -85,8 +89,23 @@ jobs:
             sudo chmod 666 /var/run/docker.sock
           fi
 
+          if ! docker buildx version >/dev/null 2>&1; then
+            arch="$(uname -m)"
+            case "$arch" in
+              aarch64|arm64) buildx_arch=arm64 ;;
+              x86_64|amd64) buildx_arch=amd64 ;;
+              *) echo "unsupported buildx arch: $arch" >&2; exit 2 ;;
+            esac
+            buildx_version="${DOCKER_BUILDX_VERSION:-v0.15.1}"
+            mkdir -p "$HOME/.docker/cli-plugins"
+            curl -fsSL \
+              "https://github.com/docker/buildx/releases/download/${buildx_version}/buildx-${buildx_version}.linux-${buildx_arch}" \
+              -o "$HOME/.docker/cli-plugins/docker-buildx"
+            chmod 0755 "$HOME/.docker/cli-plugins/docker-buildx"
+          fi
+
           docker version
-          docker buildx version || true
+          docker buildx version
           docker compose version || true
 
       - name: Hydrate provider env helper