File token-store.test.ts

packages/providers/src/codex/token-store.test.ts:None–None

import { randomBytes } from 'node:crypto';
import { mkdir, readdir, readFile, rm, stat, unlink, writeFile } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { dirname, join } from 'node:path';