画布节点较多时，virtual开启，fromJSON，zoomToFit，centerContent同时调用会偶现连线丢失

### Describe the bug

目前画布节点1000多个，virtual可视区域加载开启，在流程图初始进入时，fromJSON，zoomToFit和centerContent同时调用会偶现连线丢失问题，再就是render:done事件无效

### Your Example Website or App

公司内部项目

### Steps to Reproduce the Bug or Issue

1、画布节点1000多个，virtual可视区域加载开启
2、在流程图初始进入时，fromJSON，zoomToFit和centerContent同时调用

### Expected behavior

大画布开启可视化区域加载后，希望同时调用fromJSON，zoomToFit和centerContent能正常渲染画布，不会出现连线丢失问题，或者是在batchUpdate批量更新中去同时执行这三个操作，画布正常渲染，连线无丢失

### Screenshots or Videos

_No response_

### Platform

- OS: [e.g. macOS, Windows, Linux]
- Browser: [e.g. Chrome, Safari, Firefox]
- Version: [e.g. 2.11.1]
- Vue: 3.2.31
- @antv/x6: 2.15.1
- @antv/x6-vue-shape: 2.1.1

### Additional context

_No response_

Start by reproducing the issue with more than 1,000 nodes, virtual rendering enabled, and the fromJSON, zoomToFit, and centerContent calls during initial load. Observe the render:done event and inspect whether connections disappear after these operations or when they are grouped in batchUpdate. Done means the canvas renders all connections reliably and render:done behaves as expected.

Written by the indexing model from the issue text.