[v2] Document how to control internal observability #762
Description
- How to enable debug logging in the storage
- How to control & export tracing
- How to read and control metrics
- Health checks + config https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/extension/healthcheckv2extension/README.md#v2
Some/most of these settings are in the OTEL config.