/** Fetch that aborts when the response headers don't arrive within timeoutMs. */
export async function fetchWithTimeout(
  url: string,
  init: RequestInit,
  timeoutMs: number,
): Promise<Response> {
  const controller = new AbortController();
  const timeout = setTimeout(() => controller.abort(), timeoutMs);
  try {
    return await fetch(url, { ...init, signal: controller.signal });
  } finally {
    clearTimeout(timeout);
  }
}