Return the OneRoster sync configuration record for the given group. The authenticated user must be an owner of the group.

When no configuration has been saved yet, data is returned with all fields set to null.

{
  "success": true,
  "data": {
    "id": 7,
    "status": 3,
    "url": "ftps://user:password@ftp.example.com/oneroster/",
    "last_synced_at": 1716800000
  }
}