Fix S6964 FP: Don't raise on properties annotated with the JsonRequiredAttribute

[Hoffs]

Description

S6964 complains about "under-posting" when fields are not nullable, even though JsonRequired is specifically intended to avoid this issue.

Repro steps

public record MyRequestDto([property: JsonRequired] decimal Amount)

Expected behavior

No issue reported.

Actual behavior

S6964 issue reported.

Known workarounds

Please provide a description of any known workarounds.

Related information

• C#/VB.NET Plugins version SonarScanner 5.0.1.3006
• Visual Studio version N/A
• MSBuild / dotnet version - MSBuild 6.2, dotnet 8
• SonarScanner for .NET version (if used) dotnet-sonarscanner/6.2.0
• Operating System Linux 5.10.184-175.731.amzn2.x86_64 amd64

[mary-georgiou-sonarsource]

Hello, @Hoffs!
I confirm this is a false positive and I'll add it to our backlog.

Thanks for reporting it.