Production scorer feature inventory

Source record: docs/reference/ref-hule-general-task-0810-production-essay-scoring-feature-state-task-0810-production-essay-scoring-feature-state.md at HuleEdu revision c9d8b6ef60c19bbbdb17b9b46243ab4abfce35bb.

Production Feature Inventory

The accepted scorer registry records three different feature surfaces. The transparent and hybrid scorers do not use the same scalar set.

surface accepted identity scalar count embedding count current composition
pure feature scorer handcrafted.current.v1 31 0 Includes both accepted RST rates and the three selected T-unit metrics.
embeddings scorer embeddings.primary.v1 0 768 Contains no linguistic scalar features.
hybrid scorer combined.current.v1 38 768 Includes the satellite-relation rate and four selected parser-clause rates in its scalar component.

The source record resolves schema identity and membership from the accepted registry. The counts describe the production feature surfaces, not a claim that every feature contributes equally to a prediction.