Publish inspection through one frozen history model

internal/engine/history_source_test.go

@@ -41,7 +41,6 @@ func TestHistorySourceObservationsPreserveRawAndCompositeDefinitions(t *testing.
 	builder.observeBaseline(baseline)
 	builder.observeSourceEvidence(assembly.current.root, assembly.current.origins, assembly.current.applications, assembly.current.overlays)
 	builder.model.final = assembly.current.root
-	builder.registerDocumentRoot(assembly.current.root)
 	model := builder.freeze()
 
 	defaultPath := Keys("defaults", "nullable")
@@ -99,8 +98,7 @@ func TestHistorySourceObservationsPreserveRawAndCompositeDefinitions(t *testing.
 		}
 	}
 	inspection := &Inspection{
-		metadata: metadata, baseline: baseline, final: assembly.current.root,
-		immutableLookup: buildDocumentLookup(assembly.current.root),
+		metadata: metadata, history: model, final: assembly.current.root,
 	}
 	explanation, explained := inspection.Explain(Keys("section", "empty"))
 	var contributionSources []string