Proof of work missing in serialization

[tobuhl]

I am wondering why the proof of work is missing during the serialization/deserialization process. In detail: The serialize_transcript_internal function of bcs_common.tcc seems to be incomplete. Isn't it necessary to include the proof_of_work_ of bcs_transformation_transcript during serialization?

[tobuhl]

A possible serialization is implemented in https://github.com/tobuhl/libiop/tree/fix_serialization