Preserve sibling inheritance in configuration history and explanations

internal/engine/explain.go

@@ -72,6 +72,7 @@ func (r *Inspection) Explain(path Path) (Explanation, bool) {
 			Origin: historyApplicationOrigin(application, operationPath),
 		})
 	}
+	appendInheritanceExplanation(&explanation, &working, path, r.inheritance, r.secrets)
 
 	// Intermediate input replacements do not permanently suppress defaults:
 	// decoding applies them to the final input tree. Show that reconciliation