Interface DropCensusInput

Uppercase STEP types the categoriser explicitly intends to retain even though they are not IfcProduct/IfcRoot descendants — e.g. columnar-entity-preparation.ts's RELEVANT_NON_PRODUCT_HELPERS (IFCMATERIAL, IFCSIUNIT, IFCCLASSIFICATION, …). None of these reach IfcRoot in the schema's inheritance chain, so on isRootDescendant alone a regression that dropped one of them from that set would compute isRootDescendant: false and land in expectedSkippedClasses at info severity — indistinguishable from routine geometry/placement noise. Membership here means "the code intends to retain this class regardless of root-descendancy", so a skip is unexpectedSkippedClasses regardless of that check. Passing the set the categoriser already maintains (rather than a second, separately-hand-maintained list here) keeps the two in sync by construction.

Retention category assigned to each uppercase STEP type.

Whether each uppercase STEP type is known to the schema registry.

Distinct IFCREL* uppercase types seen.

Distinct IFCREL* uppercase types seen but not indexed as an edge.

Whether each uppercase STEP type's inheritance chain includes IfcRoot. Drives the expectedSkippedClasses / unexpectedSkippedClasses split — see ClassCensusEntry.isRootDescendant.

Records scanned, keyed by uppercase STEP type.