Stat Row

A strip of labeled stats read off the page instance. `stats` is a list of Stat specs; each resolves a `statPath` (the `/`-separated path DSL, reaching into embeddeds) against the instance and renders it as a labeled cell. Stats whose path doesn't resolve are omitted. Ontology- neutral — the publisher supplies the labels and paths (e.g. μ, ±σ, and 95% CI bounds read from an embedded estimate).