refactor: unify runner lifecycles and weight residency (#1940)

src/model/vae/hunyuan_vae.hpp

@@ -827,9 +827,7 @@ namespace Hunyuan {
             };
             auto output = restore_trailing_singleton_dims(GGMLRunner::compute<float>(get_graph,
                                                                                      n_threads,
-                                                                                     true,
-                                                                                     true,
-                                                                                     true),
+                                                                                     false),
                                                           graph_input.dim());
             if (!output.empty() && input.dim() == 4) {
                 output.squeeze_(2);