Fixed issue where JSONView does not work with @RepositoryRestController

[ruthst00]

Fixes #1260

Summary

Issue: spring-data-rest#1161 / DATAREST-891 — @JsonView annotations on @RepositoryRestController methods were silently ignored, causing all fields to be serialized regardless of the view constraint.

Root Cause: Spring MVC's JsonViewResponseBodyAdvice was not registered in the RepositoryRestHandlerAdapter (the custom RequestMappingHandlerAdapter used by Spring Data REST). Without it, the @JsonView hint set by RequestResponseBodyMethodProcessor was never picked up during response serialization.

Changes Made

1. Core Fix — RepositoryRestMvcConfiguration.java

• Added import org.springframework.web.servlet.mvc.method.annotation.JsonViewResponseBodyAdvice
• Registered new JsonViewResponseBodyAdvice() in the ResponseBodyAdvice list of repositoryExporterHandlerAdapter()

2. Test Infrastructure — new files in spring-data-rest-tests-jpa

• PersonViews.java — Jackson @JsonView marker interfaces (Summary and Full) for Person
• PersonSummaryController.java — A @RepositoryRestController with a GET /people/summary endpoint annotated with @JsonView(PersonViews.Summary.class), demonstrating the fix
• Person.java — Added @JsonView(PersonViews.Summary.class) to firstName and lastName fields

3. Test — JpaWebTests.java

• Registered PersonSummaryController in JpaContextInitializer
• Added honorsJsonViewOnRepositoryRestControllerMethod() test that verifies firstName/lastName are present and gender/created/siblings/father are absent from the summary view response

The new test (Tests run: 1, Failures: 0, Errors: 0) confirms the fix works correctly.

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