error_endpoint_collapses_5xx_to_common_999_while_preserving_status()

2026-05-12T15:59:36.369+09:00  INFO 3742337 --- [    Test worker] [traceId=] o.s.b.t.m.w.SpringBootMockServletContext : Initializing Spring TestDispatcherServlet '' 
2026-05-12T15:59:36.370+09:00  INFO 3742337 --- [    Test worker] [traceId=] o.s.t.web.servlet.TestDispatcherServlet  : Initializing Servlet '' 
2026-05-12T15:59:36.371+09:00  INFO 3742337 --- [    Test worker] [traceId=] o.s.t.web.servlet.TestDispatcherServlet  : Completed initialization in 1 ms 
2026-05-12T15:59:36.373+09:00 DEBUG 3742337 --- [    Test worker] [traceId=] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to com.project.auth.config.web.ApiErrorController#error(HttpServletRequest) 
2026-05-12T15:59:36.374+09:00 ERROR 3742337 --- [    Test worker] [traceId=] c.p.auth.config.web.ApiErrorController   : Unhandled error response. method=GET requestPath=/some/path status=503 
2026-05-12T15:59:36.375+09:00 DEBUG 3742337 --- [    Test worker] [traceId=] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Using 'application/json', given [*/*] and supported [application/json, application/*+json, application/yaml] 
2026-05-12T15:59:36.375+09:00 DEBUG 3742337 --- [    Test worker] [traceId=] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Writing [ApiResult[success=false, code=COMMON-999, message=예상하지 못한 오류가 발생했습니다., data=null, errors=null, trace (truncated)...]