Marcar como perdido

POST /v1/deals/:id/lost

curl -X POST https://api.socialsell.ai/v1/deals/664c1d2e3f4a5b6789012347/lost \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{}'

{
  "data": {
    "id": "664c1d2e3f4a5b6789012347",
    "title": "Proposta Enterprise ACME",
    "status": "lost",
    "closed_date": "2026-06-10T00:00:00.000Z"
  }
}