Confirm vault upload result

curl --request POST \
  --url https://api.case.dev/vault/{id}/upload/{objectId}/confirm \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "success": true,
  "sizeBytes": 2684354560,
  "etag": "<string>"
}
'

{
  "vaultId": "vault_123",
  "objectId": "obj_456",
  "status": "completed",
  "alreadyConfirmed": false
}