Improve Performance of Node SDK in server/request setting when using tracing

### Description

Profiling as part of https://github.com/getsentry/sentry-javascript/issues/15725 led us to see a lot of issues that we solved that got us to an approximate 40% increase in performance. This issue is tracks the remaining items we can optimize.

从 issue #15725 中的 profiling 结果开始，跟踪启用 tracing 时 Node SDK 的 server/request 路径。由于没有指定文件或测试，因此首先确定剩余的优化目标并建立性能基准；完成的标准是在不改变 tracing 行为的情况下，相对于该基准取得可量化的改进。

由索引模型根据 Issue 内容生成。