make deserializable fields pub #1525
Description
Currently we have a number of structs that are:
- deserializable
- don't have any kind of validation as part of deserialization
- have private fields
Generally speaking, private fields like this are misleading, since the fields are defacto public through a constructed serde_json::Value or similar. See for example oxidecomputer/omicron#9723.
We should audit our uses and make the fields either public or accessible via a constructor.