sleepAfter = "30m"; is this what you are looking for?

async fetch(request: Request, env: Env): Promise<Response> {
    // note: "getRandom" to be replaced with latency-aware routing in the near future
    try {
      const instanceNumber = env.WORKER_ENV === 'production' ? 2 : 1;
      const containerInstance = await getRandom(
        env.API_CONTAINER,
        instanceNumber,
      );
      const rs = await containerInstance.fetch(request);
      return rs;
    } catch (error) {
      // Surface failures cleanly in Cloudflare's logs before bubbling up
      console.error('[CloudflareContainer] fetch failed', {
        url: request.url,
        method: request.method,
        message: error instanceof Error ? error.message : String(error),
        stack: error instanceof Error ? error.stack : undefined,
      });
      throw error instanceof Error ? error : new Error(String(error));
    }
  },

async fetch(request: Request, env: Env): Promise<Response> {
    // note: "getRandom" to be replaced with latency-aware routing in the near future
    try {
      const instanceNumber = env.WORKER_ENV === 'production' ? 2 : 1;
      const containerInstance = await getRandom(
        env.API_CONTAINER,
        instanceNumber,
      );
      const rs = await containerInstance.fetch(request);
      return rs;
    } catch (error) {
      // Surface failures cleanly in Cloudflare's logs before bubbling up
      console.error('[CloudflareContainer] fetch failed', {
        url: request.url,
        method: request.method,
        message: error instanceof Error ? error.message : String(error),
        stack: error instanceof Error ? error.stack : undefined,
      });
      throw error instanceof Error ? error : new Error(String(error));
    }
  },