[service-utils] fix: export kafka producer (#6171)

Author: arcoraven

.changeset/lazy-files-act.md

@@ -0,0 +1,5 @@
+---
+"@thirdweb-dev/service-utils": patch
+---
+
+[service-utils] export KafkaProducer

packages/service-utils/src/node/index.ts

@@ -13,6 +13,7 @@ import type {
 import type { AuthorizationResult } from "../core/authorize/types.js";
 import type { CoreAuthInput } from "../core/types.js";
 
+export * from "./kafka.js";
 export * from "./usageV2.js";
 export * from "../core/usage.js";
 export * from "../core/usageV2.js";