fix(*): send jats validation errors back to client
Ryan was curious about JATS validation errors, and I pointed out that we have them on the server logs, though what's coming back to the client doesn't include the message
part of the stringified Error
object. This fixes that: it makes sure that the message
comes back. This then goes on the console log. We could also feasibly put this in the user interface, though that might be something to think about.