Reevaluate usage of CopyOnWriteArrayList

### Description

This issue is a followup of https://github.com/getsentry/sentry-java/issues/2815
We use `CopyOnWriteArrayList` in several places. We should be careful, as that could cause OOM Errors (in specific cases).
We should find the hot paths which use it, and evaluate if it makes sense (performance wise) to replace it with an alternative approach.

先查看後續 issue #2815，接著盤點 sentry-java 中 CopyOnWriteArrayList 的使用情況，並找出此處提到的 hot path。比較每種使用情境下替代方案對效能與記憶體的影響，完成條件是記錄一項明確的決策，說明哪些使用情境（如果有）應該變更。

由索引模型根據 Issue 內容生成。