[DevTask] Investigate node.widgets_values set as object

At least one extension is using an object in place of an array for `widget_values`:

https://github.com/Kosinkadink/ComfyUI-VideoHelperSuite/blob/4c7858ddd5126f7293dc3c9f6e0fc4c263cde079/web/js/VHS.core.js#L31-L159

This causes repeat issues, as the actual types defined in the core code are invalid. All tests and expectations are nominal - until the code reaches consumers, where the extensions are loaded, and things break - cannot use app at all in some instances.

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-4733-DevTask-Investigate-node-widgets_values-set-as-object-2476d73d365081a88b1ad461be6e5c3d) by [Unito](https://www.unito.io)