Resolve inheritance between identified records

internal/engine/inheritance_scope.go

@@ -159,6 +159,25 @@ func preserveInheritanceIdentityFields(merged, child *document.Node, fields []st
 	}
 }
 
+func inheritanceParentPayload(parent *document.Node, identityFields []string) *document.Node {
+	cloned := document.Clone(parent)
+	if len(identityFields) == 0 || cloned == nil || cloned.Kind != document.Mapping {
+		return cloned
+	}
+	excluded := make(map[string]struct{}, len(identityFields))
+	for _, field := range identityFields {
+		excluded[field] = struct{}{}
+	}
+	kept := cloned.Mapping[:0]
+	for _, entry := range cloned.Mapping {
+		if _, omit := excluded[entry.Key]; !omit {
+			kept = append(kept, entry)
+		}
+	}
+	cloned.Mapping = kept
+	return cloned
+}
+
 func applyIdentifiedInheritanceTemplates(
 	graph *identifiedInheritanceGraph,
 	limits projectionLimits,