nextauth

# What does this PR do?


## Test Plan

llama_stack/ui/instrumentation.ts

@@ -0,0 +1,11 @@
+/**
+ * Next.js Instrumentation
+ * This file is used for initializing monitoring, tracing, or other observability tools.
+ * It runs once when the server starts, before any application code.
+ *
+ * Learn more: https://nextjs.org/docs/app/building-your-application/optimizing/instrumentation
+ */
+
+export async function register() {
+  await import("./lib/config-validator");
+}