Spring Cloud config hot reload

### Problem Statement

Came up in https://github.com/getsentry/sentry-java/pull/2840#issuecomment-1722503337

> Would it be possible to have this sentry.enabled property hot-reloadable via a Spring Cloud Config Server ? Could we use the [Environment](https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/core/env/Environment.html) PropertyResolver to retrieve the prop when processing the event?

### Solution Brainstorm

tbd

從 PR #2840 中的討論以及連結的 Spring Environment PropertyResolver 文件開始。該 issue 沒有指定目標檔案或測試，因此首先確定如何讀取 sentry.enabled，並定義預期的 Spring Cloud Config reload 行為；完成工作需要達成共識的實作範圍和驗證測試。

由索引模型根據 Issue 內容生成。