Improve OpenTelemetry (OTLP) instrumentation about flipt

[thepabloaguilar]

Yeah, I could do it!

[thepabloaguilar]

I also saw the attributes Flipt puts in the Span, I also would like to suggest to maybe change the keys to match the ones in here Semantic Conventions for Feature Flags in Spans, it does not have all flags that flipt uses but the other maybe can just receive the feature_flag. or flipt. prefix!

[markphelps]

I love all of these suggestions! ❤️ is this something you'd be willing to help with @thepabloaguilar ?

[thepabloaguilar]

I'll open another issue to address the metrics Stuff to keep this issue more concise! The thing is, we're using OpenTelemetry Metric to export to Prometheus so we need to make configurable what metrics exporter we want to enable: Prometheus or OpenTelemetry

Both could be enabled at the same time if user wants!