Upload file attachments

curl --request POST \
  --url https://www.renovationfind.com/rest-api-v1/general-leads/{id}/attachments \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'files=<string>' \
  --form files.items='@example-file'

{
  "success": true,
  "data": [
    {
      "id": 123,
      "displayFilename": "<string>",
      "contentType": "<string>",
      "uploadDate": "2023-11-07T05:31:56Z"
    }
  ],
  "message": "<string>"
}