Obter contrato

{  "id": "ctr_abc123",  "proposal_id": "string",  "contract_number": "CONT-2026-000022",  "status": "draft",  "contract_type": "promessa",  "title": "string",  "content_type": "tiptap",  "sinal_amount": 0,  "sinal_type": "confirmatoria",  "sinal_paid_at": "2019-08-24T14:15:22Z",  "sinal_payment_method": "pix",  "template_id": "string",  "lawyer_review_required": true,  "lawyer_email": "string",  "current_version": 0,  "tenant_id": "string",  "organization_id": "string",  "visibility": "restricted",  "created_at": "2019-08-24T14:15:22Z",  "updated_at": "2019-08-24T14:15:22Z",  "created_by": "string",  "updated_by": "string"}

{  "type": "unauthorized",  "title": "Authentication Required",  "status": 401,  "detail": "authentication required",  "code": "unauthorized.auth_required",  "request_id": "req_abc123",  "timestamp": "2026-02-15T12:00:00Z",  "documentation_url": "https://docs.nobur.com.br/errors/unauthorized"}

{  "type": "forbidden",  "title": "Access Denied",  "status": 403,  "detail": "insufficient permissions",  "code": "forbidden.insufficient_permissions",  "request_id": "req_abc123",  "timestamp": "2026-02-15T12:00:00Z",  "documentation_url": "https://docs.nobur.com.br/errors/forbidden"}

{  "type": "not_found",  "title": "Resource Not Found",  "status": 404,  "detail": "broker not found",  "code": "not_found.broker",  "request_id": "req_abc123",  "timestamp": "2026-02-15T12:00:00Z",  "documentation_url": "https://docs.nobur.com.br/errors/not-found"}

{  "type": "rate_limit",  "title": "Rate Limit Exceeded",  "status": 429,  "detail": "rate limit exceeded",  "code": "rate_limit.exceeded",  "retry_after": 60,  "request_id": "req_abc123",  "timestamp": "2026-02-15T12:00:00Z",  "documentation_url": "https://docs.nobur.com.br/errors/rate-limit"}

{  "type": "internal",  "title": "Internal Server Error",  "status": 500,  "detail": "an unexpected error occurred",  "code": "internal.unexpected",  "request_id": "req_abc123",  "timestamp": "2026-02-15T12:00:00Z",  "documentation_url": "https://docs.nobur.com.br/errors/internal"}