curl --request GET \
  --url http://localhost:3000/v1/admin/customers/{id}/frequently-purchased

{
  "products": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "brand": "<string>",
      "image_url": "<string>",
      "selling_price": 123,
      "size": "<string>",
      "category_name": "<string>",
      "order_count": 123
    }
  ]
}