Add x5u when creating a participant context

[phwolf]

Hello 👋 ,

when creating a participant context :

curl --location 'http://localhost:18181/api/identity/v1alpha/participants/' \
--header 'Content-Type: application/json' \
--header 'X-Api-key: .... ' \
--data '{
  "roles": [],
  "serviceEndpoints": [...],
  "active": true,
  "participantId": "did:web:edc-provider%3A7083",
  "did": "did:web:edc-provider%3A7083",
  "key": {
    "keyId": "did:web:edc-provider%3A7083#key-1",
    "privateKeyAlias": "key-1",
      "publicKeyJwk": {
        "kty": "RSA",
        "kid": "q7Br89MDU0pbnBELpEwMHuy8KmOZXoZLIVb3gVGN9So",
        "n": "l2p0GOipSrw8CPOxPf......",
        "e": "AQAB",
        "alg": "RS256",
        "x5u": "https://www.example.com/cert.pem"    <---- this is not working
      }
    }
}'

ist it possible to somehow add that x5u property (which points to a X.509 certificate) so that the resulting did document of the participant will include the field inside publicKeyJwk?

Thank you!