GET /products/{productId}/variants

curl --request GET \
  --url https://admin.fanfare.io/api/products/{productId}/variants \
  --header 'Authorization: Bearer <token>'

[
  {
    "options": [
      {
        "optionId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "optionName": "<string>",
        "value": "<string>",
        "valueId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
      }
    ],
    "archived": true,
    "createdAt": "2023-11-07T05:31:56Z",
    "createdBy": "<string>",
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "inventoryQuantity": 123,
    "organizationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "price": "<string>",
    "productId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "sku": "<string>",
    "metadata": {},
    "primaryExternalId": "<string>",
    "primaryLastSyncedAt": "2023-11-07T05:31:56Z",
    "primarySourceVendor": "<string>",
    "primarySyncSourceId": "<string>",
    "updatedAt": "2023-11-07T05:31:56Z",
    "updatedBy": "<string>"
  }
]