Profile the server using `clj-async-profiler`

Here's a [profile](https://github.com/kienstra/data-store/files/12425945/01-cpu-flamegraph-2023-08-24-00-07-16.html.zip) of the server, from `clj-async-profiler`:

<img width="1363" alt="Screenshot 2023-08-24 at 12 12 34 AM" src="https://github.com/kienstra/data-store/assets/4063887/c3bf9c2f-d33c-431e-91d5-a0e802814c90">
