from datetime import datetimefrom services.data_fetcher import get_latest_datafrom services.fetchers._store import source_timestamps, active_layers, source_freshnessfrom services.fetch_health import get_health_snapshot  def _fmt_ts(ts: str | None) -> str:    if not ts:        return "-"    try:        return datetime.fromisoformat(ts).strftime("%Y-%m-%d %H:%M:%S")    except Exception:        return ts  def main():    data = get_latest_data()    print("=== Diagnostics ===")    print(f"Last updated: {_fmt_ts(data.get('last_updated'))}")    print(        f"Active layers: {sum(1 for v in active_layers.values() if v)} enabled / {len(active_layers)} total"    )     print("\n--- Source Timestamps ---")    for k, v in sorted(source_timestamps.items()):        print(f"{k:20} {_fmt_ts(v)}")     print("\n--- Source Freshness ---")    for k, v in sorted(source_freshness.items()):        last_ok = _fmt_ts(v.get("last_ok"))        last_err = _fmt_ts(v.get("last_error"))        print(f"{k:20} ok={last_ok} err={last_err}")     print("\n--- Fetch Health ---")    health = get_health_snapshot()    for k, v in sorted(health.items()):        print(            f"{k:20} ok={v.get('ok_count', 0)} err={v.get('error_count', 0)} "            f"last_ok={_fmt_ts(v.get('last_ok'))} last_err={_fmt_ts(v.get('last_error'))} "            f"avg_ms={v.get('avg_duration_ms')}"        )  if __name__ == "__main__":    main()