feat: add openTelemetry instrumentation

[SgtPooki]

We should enable openTelemetry instrumentation via an environment variable

Resources

• https://github.com/open-telemetry/opentelemetry-js
• https://opentelemetry.io/docs/instrumentation/js/exporters/#prometheus

[BigLep]

I believe the key usecae we want to have with this work is being able to see traces for a request.