Get smart charging settings

curl --request GET \
  --url https://cloud.volttime.com/api/v3/sites/{site_uuid}/smart-charging \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "timezone": null,
    "smart_charging": "disabled",
    "day_ahead_pricing_strategy": "automatic",
    "day_ahead_pricing_threshold": null,
    "day_ahead_pricing_smart_mode_price": null,
    "off_peak_start": "23:00",
    "off_peak_end": "07:00"
  }
}