Add benchmarking

[gaurav]

It would be great to have benchmarking to check the speed of a set of queries and to load-test NodeNorm instances.

Possible options:

• https://predator.dev
• GitHub Actions

We do have the NodeNorm/NameRes/Babel validation sheet, which we could use to set up and test integration tests. Note that that spreadsheet can include failing tests currently in development.

[gaurav]

Now implemented in TranslatorSRI/babel-validation#27. Jaegar tracing is covered in #225. So I think we can close this.