Support Server-Timing Headers

[sdzhong]

Problem Statement

RE: #5838 (reply in thread),

Supporting https://developer.mozilla.org/en-US/docs/Web/API/PerformanceServerTiming seems very interesting, will ask our performance team to take a look!

This was discussed internally but it didn't move forward. This is a GitHub Issue feature request for supporting https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Server-Timing

Solution Brainstorm

Show Server-Timing headers data in Sentry spans

[andreiborza]

Thanks for filing this @sdzhong, we'll discuss it in our planning meeting.