嵌套节点node.clone({deep: true})无效

### Describe the bug

嵌套节点node.clone({deep: true})无效，cloneNode.store.data.children有值，但是cloneNode.children和cloneNode._children没有值


clone.setChildren(embeds), _children 在这里设置了但还是空数组

### Your Example Website or App

https://codesandbox.io/p/sandbox/elastic-wood-shyyk8?file=%2Findex.ts%3A10%2C27

### Steps to Reproduce the Bug or Issue

点击嵌套节点，复制的新节点没有子节点

### Expected behavior

deep: true能正常工作

### Screenshots or Videos

_No response_

### Platform

- OS: [e.g. macOS, Windows, Linux]
- Browser: [e.g. Chrome, Safari, Firefox]
- Version: [e.g. 2.11.1]

### Additional context

_No response_

Start with the linked CodeSandbox reproduction and the node.clone({deep: true}) path described in the issue. Inspect how cloneNode.store.data.children relates to cloneNode.children and cloneNode._children, including the clone.setChildren(embeds) call. Done means clicking a nested node and copying it produces a clone whose child nodes are available through the expected properties.

Written by the indexing model from the issue text.