JwkEcSerializer
Serializer for Jwk.Ec values to and from their JSON Web Key representation per RFC 7517.
Encodes the required EC parameters (crv, x, y) and optional private key parameter (d) as Base64URL strings, along with optional metadata fields (use, key_ops, alg, kid). Throws co.touchlab.kjwt.exception.MalformedJwkException during deserialization if a required field is missing.