Why was the annotation @WithSpan moved out

[Emily-Jiang]

I just noticed in the release 1.19, the annotation WithSpan the SpanAttribute was moved to another project, which is in alpha state. I have a few concerns:

1. Why was the reason of moving these annotationed moved to java-instrumentation? I looked at the issue 6245, but I did not find out why.
2. Are the annoations stable since they were moved to a unstable project [opentelemetry-java-instrumentation](https://github.com/open-telemetry/opentelemetry-java-instrumentation)
3. This move is a breaking change. Should this happen in a minor release.

[trask]

hi @Emily-Jiang!

the main reason the annotations were moved to the instrumentation repo is so that they can evolve alongside the instrumentation code, as we found ourselves at a roadblock in #4260

opentelemetry-java-instrumentation is not inherently unstable, though the new annotation artifact in the instrumentation repository is currently marked unstable. we have an issue tracking making the new annotation artifact stable: open-telemetry/opentelemetry-java-instrumentation#6494, if you can comment over there it could help move that along

whether this move is a breaking change was discussed over a couple of SIG meetings, and the consensus is summarized in #4729

[jack-berg]

I'm going to close this issue. Please feel free to re-open if more information is needed on the stability guarantees!