[Epic] OpenAPI in .NET 7

[rafikiassumani-msft]

(*) ‼️ = Prevents users from successfully using OpenAPI, 🔨 = Improves the experience for using OpenAPI
S = A few hours
M = A few days
L = About a week
XL = Multiple weeks

Issue	Category	Impact (*)	Priority	Size	Status
Route constraints don't produce appropriate information in OpenAPI schema (#36525)	aspnetcore-bugs	‼️	P0	M	✅ (7.0-preview1)
ASP.NET Core templates that include both Open API and Authentication should include scaffolding for Swagger to authenticate users (#36185)	aspnetcore-features	🔨	P1	S	❌ Superseded by #39761
Support Deprecated in Minimal APIs for Open API (#35091)	aspnetcore-features	🔨	P2	S	✅ (7.0-preview4)
Support setting server on PathItem or Operation for each endpoint/controller/action	aspnetcore-features	‼️	P1	S	✅ (7.0-preview4)
Respect EndpointGroupName attributes in MVC ApiExplorer (#35055)	aspnetcore-bugs	‼️	P0	S	✅ (7.0-preview1)
Support minimal APIs in NSwag (RicoSuter/NSwag#3560)	partner-features	🔨	P1	M	✅ (7.0-preview1)
Automatically set endpoint metadata for minimal APIs (#34544)	aspnetcore-features	🔨	P1	M
Create an analyzer to help verify and fix endpoint metadata of minimal APIs (#34543)	aspnetcore-features, analyzers	🔨	P1	L
Support authentication and authorization in OpenAPI (#34546)	aspnetcore-features	‼️	P0	L	❌ Closed as a dupe of #39761
DateOnly and TimeOnly are displayed as complex objects in open-api schemas rather simple string (#37045)	aspnetcore-bugs	🔨	P2	S	❌ DateOnly and TimeOnly not supported by JSON schema
Generating REST Clients for .NET Minimal / Web API APIs (#36636)	aspnetcore-features	🔨	P1	XL
API analyzers should support undeclared status codes (#15385)	aspnetcore-bugs, analyzers	🔨	P3	M
API analyzer doesn't recognize ControllerBase.ValidationProblem (#6061)	aspnetcore-bugs, analyzers	🔨	P3	M
ProblemDetails is not returned for 404NotFound and 500Exception (#4953)	aspnetcore-bugs	🔨	P3	S	❌ Not actually OpenAPI
Mvc.Api.Analyzers not recognizing methods from a Base Class (#4410)	aspnetcore-bugs	🔨	P3	M
Security schemes cannot be generated for individual endpoints/actions	aspnetcore-bugs	‼️	P0	M
Descriptions and examples cannot be set for endpoints or controllers (#37906)	aspnetcore-bugs	‼️	P0	S	✅ (7.0-preview4)
Share more RequestDelegateFactory.CreateArgument logic (#33644)	aspnetcore-bugs	🔨	P2	M