Calculated fields are not visible in the schema

[leiserfg]

The schema of the models uses validation instead of serialization and that causes the computed fields not to be shown (see https://docs.pydantic.dev/latest/api/json_schema/#pydantic.json_schema.JsonSchemaMode).

[aurbano]

@vitalik is there a known workaround for this, or a plan to address?

I can try to send a PR if you point me in the direction of where to fix

[vitalik]

@aurbano sure - go ahead