Onboard site and asset

curl --request POST \
  --url https://api-sandbox.axle.energy/entities/site/onboard-site-and-asset \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "site": {
    "mpan": "1234567890123",
    "postcode": "SW1A 1AA",
    "street_address": "10 Downing Street",
    "gave_boundary_meter_consent_at": "2025-01-01T12:00:00Z",
    "email": "test@example.com"
  },
  "asset": {
    "external_id": "charger-001",
    "type": "charger",
    "properties": {
      "power_kw": 7.4
    }
  },
  "dispatch_consent": {
    "dispatch_methods": [
      "limited_pause"
    ]
  }
}
'

{
  "site": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "mpan": "<string>",
    "postcode": "<string>",
    "address": "<string>",
    "asset_ids": [],
    "markets": [
      "cm"
    ],
    "dispatch_methods": [
      "cm_infrequent_dispatch"
    ],
    "tariff": {
      "tariff_type": "single_rate",
      "tariff_cheap_start_time": "<string>",
      "tariff_cheap_end_time": "<string>"
    },
    "gave_boundary_meter_consent_at": "2023-11-07T05:31:56Z"
  },
  "asset": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "external_id": "<string>",
    "type": "boundary meter",
    "site_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "properties": {
      "power_kw": 1,
      "capacity_kwh": 1
    }
  }
}