[release/9.0-staging] Fix transformer handling of boolean schemas in JsonSchemaExporter. by github-actions[bot] · Pull Request #109975

[release/9.0-staging] Fix transformer handling of boolean schemas in JsonSchemaExporter. by github-actions[bot] · Pull Request #109975 · dotnet/runtime

Backport of #109954 to release/9.0-staging

/cc @eiriktsarpalis

Customer Impact

Customer reported
Found internally

Reported by an external customer in #109868. Fixes a bug in JsonSchemaExporter that occurs when users apply schema transformers on types with custom converters. It has the potential to produce incorrect schemas under certain circumstances.

Regression

Testing

Added unit testing for the impacted scenario.

Risk

Low. Makes a small and targeted change to product code.