Optimize Ci::ArchiveTraceWorker

Everyone can contribute. Help move this issue forward while earning points, leveling up and collecting rewards.

• Close this issue

Ci::ArchiveTraceWorker jobs use a significant amount of CPU on Sidekiq.

Attached is a stack-prof flamegraph generated on a pod:

One thing we can do is reuse Fog::Storage for each chunk, since this makes an HTTP request to retrieve credentials.