Read whether the Impreza agent can be installed on a VPS, and the install state

For one Proxmox VPS of the account: whether the one-click agent install applies now (agent_installable, and the reason when it does not), what the agent is, the install job and the agent once it registers. When the install applies, confirm_token is a consent token for the POST, valid 5 minutes, bound to this account, this service, the API key that asked and the hash of the install script. No address is returned. Scope read.