Function cleanup

src/index.ts:33–45

()

  let isShuttingDown = false;

  const cleanup = () => {
    if (isShuttingDown) return;
    isShuttingDown = true;

    console.log(`Shutting down server (PID: ${process.pid})...`);
    try {
      transport.close();
    } catch (error) {
      console.error(`Error closing transport (PID: ${process.pid}):`, error);
    }
    console.log(`Server closed (PID: ${process.pid})`);
    process.exit(0);
  };

  transport.onerror = (error: Error) => {
    console.error(`Transport error (PID: ${process.pid}):`, error);