Append-or-update metadata/measurement_scale.csv by (key, label)
Source: R/registry_measurement_face.R
register_measurement_scale.Rdkind is one of familiar | physical | threshold | computed (D7). A
computed mark's value is recomputed at build time from how (the
function and its inputs) and is never trusted from the CSV — this registry
holds the recipe and a value for reference, not the release's number.