fix(e2e): schedule deploy pod on same node as Headlamp

The headlamp-plugins PVC is ReadWriteOnce, so the temporary deploy
pod must run on the same node as the Headlamp pod to mount it.
Look up the Headlamp pod's node and set nodeName in the pod spec.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

scripts/deploy-plugin-via-volume.sh

@@ -37,6 +37,25 @@ TAR_FILE=$(mktemp /tmp/plugin-XXXXXX.tar.gz)
 tar -czf "$TAR_FILE" -C "$DIST_DIR" . -C "$REPO_ROOT" package.json
 echo "  Tarball:   $TAR_FILE ($(du -h "$TAR_FILE" | cut -f1))"
 
+# Find the node where Headlamp is running — the PVC is ReadWriteOnce so
+# the deploy pod must land on the same node to mount it.
+HEADLAMP_NODE=$(kubectl get pods -n "$HEADLAMP_NAMESPACE" \
+  -l "app.kubernetes.io/name=headlamp" \
+  -o jsonpath='{.items[0].spec.nodeName}' 2>/dev/null || true)
+if [ -z "$HEADLAMP_NODE" ]; then
+  # Fallback: try by deployment label
+  HEADLAMP_NODE=$(kubectl get pods -n "$HEADLAMP_NAMESPACE" \
+    -l "app.kubernetes.io/instance=headlamp" \
+    -o jsonpath='{.items[0].spec.nodeName}' 2>/dev/null || true)
+fi
+if [ -n "$HEADLAMP_NODE" ]; then
+  echo "  Headlamp node: $HEADLAMP_NODE (scheduling deploy pod there)"
+  NODE_OVERRIDE="\"nodeName\": \"$HEADLAMP_NODE\","
+else
+  echo "  WARNING: Could not determine Headlamp node, deploy pod may fail if PVC is ReadWriteOnce"
+  NODE_OVERRIDE=""
+fi
+
 # Clean up any previous deploy pod
 kubectl delete pod plugin-deploy -n "$HEADLAMP_NAMESPACE" --ignore-not-found --wait=false 2>/dev/null || true
 sleep 2
@@ -50,6 +69,7 @@ kubectl run plugin-deploy \
   --namespace="$HEADLAMP_NAMESPACE" \
   --overrides="{
     \"spec\": {
+      ${NODE_OVERRIDE}
       \"containers\": [{
         \"name\": \"plugin-deploy\",
         \"image\": \"busybox:1.36\",