Function writer

python/openshell/sandbox_test.py:1225–1238

(idx: int)

        errors: list[BaseException] = []

        def writer(idx: int) -> None:
            try:
                barrier.wait()
                r._write_to_disk(
                    {
                        "access_token": f"a-{idx}",
                        "refresh_token": f"r-{idx}",
                        "expires_at": 1_700_000_000 + idx,
                        "issuer": DEFAULT_ISSUER,
                        "client_id": "openshell-cli",
                    }
                )
            except BaseException as e:
                errors.append(e)

        threads = [threading.Thread(target=writer, args=(i,)) for i in range(N)]
        for t in threads: