Reentrant structuredClone breaks outer circular references

Description

The React Native structuredClone polyfill reuses one module-global memory map under the assumption that cloning does not invoke user code. Enumerable property getters do execute, however, and can call structuredClone recursively. The inner call's finally clears the outer clone's memory, so later circular references are cloned again instead of pointing to the outer result.

Expected behavior

Each reentrant clone should have independent cycle-detection memory, while ordinary non-reentrant calls may retain the existing reusable-map optimization.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

首先定位 React Native structuredClone polyfill 及其用于循环检测的内存处理。复现一个来自可枚举 getter、带有外部循环引用的嵌套克隆，然后验证重入调用使用独立内存，同时普通克隆保持其行为。