Retorna os dados cadastrais da conta autenticada.
curl https://beta.venopayments.com/api/v1/seller \ -H "Authorization: Bearer veno_live_..."
{ "id": "uuid-da-conta", "name": "Minha Loja", "status": "active", "company_name": "Minha Loja Ltda", "trade_name": "Minha Loja", "document": "00.000.000/0001-00", "kyc_status": "approved", "created_at": "2026-01-10T09:00:00Z" }