Attr Finalizing and Raw Deserialization
Attr Finalizing and Raw Deserialization

Add _finalize stub method to Attribute. Add `raw` argument to
DataBlob._set_attr_val.

When not set with the `raw` argument, attr values will be passed through
_finalize after validation. Splitting this off into a separate function
ensures that there won't be issues from transforming values mid-validation
in cases like repeating values for request confirmation.

whutch/cwmud,whutch/atria