## Description

Adding a few performance headers for the AFR responses. Mainly focusing
on the historian and generic http services.
The goal was to also set the content-length in every response but,
unfortunately, chunking is enabled and, as they are exclusive,
content-length does not show up on larger payloads.
More information can be found
[#AB4090](https://dev.azure.com/fluidframework/internal/_workitems/edit/4090)