Update proxy.js

proxy.js

@@ -38,6 +38,11 @@ async function retryWith503Backoff(url, options, startTime) {
       return response;
     }
     
+    // Don't retry 401 (Unauthorized) - return immediately
+    if (response.status === 401) {
+      return response;
+    }
+    
     // For 503: retry with exponential backoff until max time
     // For other errors: retry up to 3 times, then return the error
     if (response.status === 503) {