Marouane

The `X-Correlation-ID` is always added to outbound requests' headers. It propagates the trace ID. What do you mean by tracing tool? Because this header is not set on requests that...

Since we want to guarantee backward compatibility with OpenCensus, I tried to use the [OpenCensus bridge module](https://pkg.go.dev/go.opentelemetry.io/otel/bridge/[email protected]#section-readme). However, an open [issue](https://github.com/open-telemetry/opentelemetry-go/issues/2204) hinders me. I'm trying to find a workaround.

As of now, it's not possible to define boundaries for histograms at the instrument level with opentelemetry-go. Issues: https://github.com/open-telemetry/opentelemetry-go/issues/689, https://github.com/open-telemetry/opentelemetry-go/issues/2678.