refactor(gateway): share node invoke error handling

src/gateway/server-methods/nodes.ts

@@ -28,6 +28,7 @@ import {
 import { handleNodeInvokeResult } from "./nodes.handlers.invoke-result.js";
 import {
   respondInvalidParams,
+  respondUnavailableOnNodeInvokeError,
   respondUnavailableOnThrow,
   safeParseJson,
   uniqueSortedStrings,
@@ -433,14 +434,7 @@ export const nodeHandlers: GatewayRequestHandlers = {
         timeoutMs: p.timeoutMs,
         idempotencyKey: p.idempotencyKey,
       });
-      if (!res.ok) {
-        respond(
-          false,
-          undefined,
-          errorShape(ErrorCodes.UNAVAILABLE, res.error?.message ?? "node invoke failed", {
-            details: { nodeError: res.error ?? null },
-          }),
-        );
+      if (!respondUnavailableOnNodeInvokeError(respond, res)) {
         return;
       }
       const payload = res.payloadJSON ? safeParseJson(res.payloadJSON) : res.payload;