Function transformer_config_from_dsl 

pub fn transformer_config_from_dsl(cfg: &TransformerConfig) -> TransformerConfig

Resolve a DSL transformer instance against the embedded model registry.

Explicit scalar fields on cfg override model-library defaults. The current DSL cannot distinguish explicit default zeros for DCR/Cp from unspecified values, so zero-valued DCR/Cp intentionally remain explicit only for generic transformer(ratio, Lp, ...) instances; model-backed instances inherit model DCR/Cp unless a non-zero override is present.