export function parseTimeoutMs(raw: unknown): number | undefined {
  if (raw === undefined || raw === null) return undefined;
  let value = Number.NaN;
  if (typeof raw === "number") {
    value = raw;
  } else if (typeof raw === "bigint") {
    value = Number(raw);
  } else if (typeof raw === "string") {
    const trimmed = raw.trim();
    if (!trimmed) return undefined;
    value = Number.parseInt(trimmed, 10);
  }
  return Number.isFinite(value) ? value : undefined;
}