[Idea]: Emit llama-swap compatible timing data #31

What problem would this solve?

Right now llama-swap doesn't have any usage data on RustingStrata. Ideally either add an extractor to llama-swap (for example see https://github.com/mostlygeek/llama-swap/blob/main/internal/server/usage/llamaserver.go) or emit compatible timing data.

Proposed improvement

Emit llama-swap compable timing data, for example https://github.com/mostlygeek/llama-swap/blob/main/internal/server/usage/llamaserver.go

Alternatives and tradeoffs

Add a new extractor to llama-swap. it's somewhat cleaner, but involves opening a PR at that project.