fix: add timeout to fetch to prevent silent hangs (#883)

Add `AbortSignal.timeout(5s)` to fetch requests to ensure they fail fast
instead of hanging indefinitely when network issues occur.

src/utils/fetch.ts

@@ -14,8 +14,17 @@ export function getProxyAgent() {
   return undefined;
 }
 
-export const fetch = async (url: string, opts: RequestInit) =>
-  await undiciFetch(url, {
+export const fetch = async (url: string, opts: RequestInit) => {
+  // Merge timeout signal with any existing signal from opts
+  const timeoutSignal = AbortSignal.timeout(5_000);
+  const existingSignal = opts.signal;
+  const mergedSignal = existingSignal
+    ? AbortSignal.any([timeoutSignal, existingSignal])
+    : timeoutSignal;
+
+  return await undiciFetch(url, {
     dispatcher: getProxyAgent(),
     ...opts,
+    signal: mergedSignal,
   });
+};