{
  "kind": "node",
  "iterations": 120000,
  "ok": false,
  "error": "Pbkdf2 failed: iteration counts above 100000 are not supported (requested 120000).",
  "b64": null,
  "expected_b64": "SgU02iy51noz9Ww6ltyMpRmPN1itOWO82cvzJ5hID6w=",
  "matches_python": false,
  "wall_ms": 0,
  "wall_ms_note": "墙上时钟，**不是** CPU 证明；CPU 结论只看平台实际错误（客户端单独记录 HTTP 状态/错误页）"
}