This project is a reproducer for quarkusio/quarkus#31298.
Run mvn clean verify and UserProfileDataApiTest.testUploadMultipartFormdata will fail.
[ERROR] UserProfileDataApiTest.testUploadMultipartFormdata:48 » IllegalState Form element 'org.acme.UserProfileDataApi$PostUserProfileDataMultipartForm.id' could not be converted to 'String' for REST Client interface 'org.acme.UserProfileDataApi'. A proper implementation of 'javax.ws.rs.ext.ParamConverter' needs to be returned by a 'javax.ws.rs.ext.ParamConverterProvider' that is registered with the client via the @RegisterProvider annotation on the REST Client interface.