Support inferring rate-limited endpoints in OpenAPI

[captainsafia]

Starting in .NET 7, it is possible to enable rate-limiting on certain endpoints. When this is the case, the endpoints might return a response with a 503 status code.

We don't currently pass this information to any OpenAPI annotations, but we should probably document this when it is possible to infer.

Note: this is similar to the problem with the global ProblemDetails service (pun intended) and is related to #44192.

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 8 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.