Fix/vue nodes auto scale (#6664)

## Summary

**Problem:** ensureCorrectLayoutScale scales up LG -> Vue. But doesn't
scale down from Vue -> LG.

**Solution:** Bi directional scaling.

**Bonus:** fix edge cases such as subgraphs, groups, and reroutes. Also,
set auto scale: true now that we 'preserve' LG scale.

**IMPORTANT:** useVueNodeResizeTracking.ts sets vue node height -
Litegraph.NODE_TITLE_HEIGHT on workflow load using a resize observer.
Reloading the page (loading a workflow) in Vue mode, will subtract
height each time. This can look like a problem caused by
ensureCorrectLayoutScale. It is not. Need to fix. Here was an attempt by
[removing the Litegraph.NODE_TITLE_HEIGHT
entirely](https://github.com/Comfy-Org/ComfyUI_frontend/pull/6643).

## Review Focus

Full lifecycle of loading workflows and switching between vue and lg.
Race conditions could be present. For example switching the mode using
keybind very fast.

## Screenshots (if applicable)


https://github.com/user-attachments/assets/5576b760-13a8-45b9-b8f7-64e1caf443c1



https://github.com/user-attachments/assets/46d6f870-df76-4084-968a-53cb629fc123

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Co-authored-by: github-actions <github-actions@github.com>

src/platform/settings/constants/coreSettings.ts

@@ -1101,7 +1101,7 @@ export const CORE_SETTINGS: SettingParams[] = [
       'Automatically scale node positions when switching to Vue rendering to prevent overlap',
     type: 'boolean',
     experimental: true,
-    defaultValue: false,
+    defaultValue: true,
     versionAdded: '1.30.3'
   },
   {