DeserializedClientId
public struct DeserializedClientId
extension DeserializedClientId: Sendable
This directly represents a ClientId of the <userid>:<device-id>@<domain> format.
Instantiate via [ClientId::deserialize].
Its Display reproduces the bytes of the [ClientId] it came from, so the device id is
rendered as unpadded hex. Note that this differs from [DeviceId::to_hex_string], which is
fixed-width: a client id is not a hex-encoded binary value, and only the unpadded form matches
what an E2EI certificate carries.