export function shouldRunDerivedRefreshForEvent({
  event,
  now = new Date().toISOString(),
  maxEventAgeMs,
} = {}) {
  const maxAge = Number(maxEventAgeMs);
  if (!Number.isFinite(maxAge) || maxAge < 0) return true;

  const eventAt = event?.ingested_at || event?.observed_at || null;
  if (!eventAt) return true;

  const age = Date.parse(now) - Date.parse(eventAt);
  if (!Number.isFinite(age)) return true;
  return age <= maxAge;
}