Rename http.*.duration to http.*.request.duration

[lmolkova]

Fixes #222

[jack-berg]

Is this change allowed given that http.server.duration is marked as Feature freeze? Or at least is both experimental and feature freeze. As mentioned here, I'm confused how a single metric have have both statuses simultaneously.

[reyang]

Is this change allowed given that http.server.duration is marked as Feature freeze? Or at least is both experimental and feature freeze (to control the scope). As mentioned here, I'm confused how a single metric have have both statuses simultaneously.

Yes, feature-freeze is just saying "we don't accept new features", it has nothing to do with breaking changes, we can (in theory) break everything as long as it is experimental https://github.com/open-telemetry/opentelemetry-specification/blob/ad1537a46eb856eeb915786fd7cf81e07bdeb426/specification/document-status.md?plain=1#L19

[jack-berg]

Got it - makes sense. I wasn't thinking about feature freeze correctly.