Key attestation generation is not supported

[Didr]

When using the reference issuer from wwWallet, I receive this from the go-wallet-backend backend as the PID is getting issued:

{
    "error": "UNSUPPORTED",
    "message": "key attestation generation is not supported"
}

is this something we will support?
If not, we need to remember to remove "attestation" from the following value in the frontend config:
VITE_OPENID4VCI_PROOF_TYPE_PRECEDENCE="attestation,jwt"
If we remove "attestation", it works.

[smncd]

I suspect this will stay like this for now. AFAIK we still need to figure out how to properly check the client in order to give out these attestations