Bulk upsert contacts from CSV

curl --request POST \
  --url http://localhost:8080/api/v1/client/contacts/bulk/csv \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file' \
  --form overwrite_blank_fields=true \
  --form has_header=true \
  --form 'delimiter=,' \
  --form 'default_timezone=<string>'

{
  "data": {},
  "errors": [
    {
      "condition": "format",
      "error": "Invalid email format",
      "key": "email"
    }
  ],
  "message": "Operation successful",
  "meta": {},
  "success": true
}