OpenAPI 3.2 Support for Server Sent Events

[desjoerd]

Is there an existing issue for this?

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Is your feature request related to a problem? Please describe the problem.

No response

Describe the solution you'd like

OpenAPI 3.2 supports sequential media types like Server Sent Events (see https://learn.openapis.org/specification/media-types).
This feature request is to add built-in support for operations returning SseItems (see https://learn.microsoft.com/en-us/aspnet/core/fundamentals/minimal-apis/responses?view=aspnetcore-10.0#server-sent-events-sse)

Additional context

Requires Microsoft.OpenApi to be updated to 3.x (#64368)

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• Add support for emitting ServerSentEvents from minimal APIs #56172
• SseItem response in Results.ServerSentEvents #64183