fix: bench-blob revalidate 300s to fix perp ISR conflict

src/lib/bench-blob.ts

@@ -54,7 +54,7 @@ async function fetchJson(url: string): Promise<unknown | null> {
   try {
     const res = await fetch(url, {
       signal: AbortSignal.timeout(FETCH_TIMEOUT_MS),
-      cache: "no-store",
+      next: { revalidate: 300 },
     });
     if (!res.ok) return null;
     return await res.json();