Fix: Add HF_TOKEN to fetchJson for 401 error

src/utils/parquetUtils.ts

@@ -25,7 +25,16 @@ export interface DatasetMetadata {
 }
 
 export async function fetchJson<T>(url: string): Promise<T> {
-  const res = await fetch(url);
+  // Get token from environment (set in Space secrets)
+  const hfToken = process.env.HF_TOKEN;
+  const headers: HeadersInit = {};
+  
+  // Add Authorization header if token is available
+  if (hfToken) {
+    headers["Authorization"] = `Bearer ${hfToken}`;
+  }
+  
+  const res = await fetch(url, { headers });
   if (!res.ok) {
     throw new Error(
       `Failed to fetch JSON ${url}: ${res.status} ${res.statusText}`,