update endpoint. This endpoint is only used to tell the backend any external operation (like a bank transfer) has been completed, and the ramp can start.curl --location '/v1/ramp/start' \
--header 'Content-Type: application/json' \
--data '{
"rampId": "proc_12345"
}'{
"createdAt": "2024-05-16T10:00:00Z",
"currentPhase": "processing",
"depositQrCode": "00020126...",
"from": "stellar",
"id": "proc_12345",
"quoteId": "quote_7af7171e-aa42-49a2-80c2-9e18483bad38",
"to": "pix",
"type": "sell",
"unsignedTxs": [],
"updatedAt": "2024-05-16T12:30:00Z"
}