Enforce the retained history node limit

internal/engine/inheritance_history_test.go

@@ -124,6 +124,7 @@ func inheritanceInspectionFromComposition(t *testing.T, composed *composedDocume
 	}
 	metadata := metadataFromDecoded(decoded)
 	applyInheritanceMetadata(&metadata, composed.root, composed.origins, composed.overlays, expanded)
+	metadata.inheritance = cloneInheritanceOperations(expanded.operations)
 	finalizeMetadataPaths(&metadata, expanded.root, composed.applications, baseline, composed.root)
 	return &Inspection{
 		metadata: metadata, baseline: baseline, input: expanded.root, preCLI: expanded.root,
@@ -388,15 +389,18 @@ func TestInheritanceHistoryPrecedesApplicationResolution(t *testing.T) {
 func TestHistoryNodeBudgetCountsSharedInheritanceEvidenceOnce(t *testing.T) {
 	shared := &document.Node{Kind: document.String, Text: "shared"}
 	extra := &document.Node{Kind: document.String, Text: "extra"}
-	expansion := &inheritanceScope{
-		root:         shared,
-		operations:   []inheritanceOperation{{parent: shared, effective: shared}},
-		replacements: []inheritanceReplacement{{before: shared, after: extra}},
+	inspection := &Inspection{
+		inheritance: []inheritanceOperation{{parent: shared, effective: shared}},
+		metadata:    Metadata{inheritance: []inheritanceOperation{{parent: shared, effective: extra}}},
 	}
-	if !historyNodesWithin(2, nil, nil, nil, nil, nil, expansion) ||
-		historyNodesWithin(1, nil, nil, nil, nil, nil, expansion) {
+	counter := newRetainedNodeCounter(2)
+	if !addInspectionHistory(counter, inspection) || counter.count != 2 {
 		t.Fatal("shared evidence node accounting is incorrect")
 	}
+	counter = newRetainedNodeCounter(1)
+	if addInspectionHistory(counter, inspection) {
+		t.Fatal("distinct inheritance evidence did not consume the budget")
+	}
 }
 
 func TestInheritanceExpansionEnforcesRetainedHistoryBudget(t *testing.T) {