ConformalConfig

Language-independent config for an rtemis conformal prediction region. Mirrors the `ConformalConfig` object: a construction plus its construction-specific settings. The construction is tagged rather than inferred, since which of them a run may use depends on the model it is applied to, not on the document. `type` selects the variant and its settings are siblings of it, validated against the variant's own schema below. Anything not set takes rtemis's default, so an object holding only `type` is that variant with every default.