RPC server: ensure MaskedObjectExceptions can be encoded
Our error handlers were missing an application of the extra encoders, so SWHIDs weren't encodable as exception arguments, and the new MaskedStatuses weren't supported by our encoders.
Our error handlers were missing an application of the extra encoders, so SWHIDs weren't encodable as exception arguments, and the new MaskedStatuses weren't supported by our encoders.