Add Module tag to module's parents

src/gaemstone/ECS/Universe+Modules.cs

@@ -157,6 +157,10 @@ internal class ModuleInfo
 		}
 
 		Entity = module.Build().CreateLookup(Type);
+
+		// Ensure that all the parent entities have Module set, too.
+		for (var p = Entity.Parent; p != null; p = p.Parent)
+			p.Add<Module>();
 	}
 
 	public void Enable()