面向失败的设计理念是什么


dubbo3的最大特性之一基于应用粒度的服务发现，对比应用级服务发现单机常驻内存下降75%，这两个应用及服务发现是有什么不一样吗？

Review the screenshots and the Dubbo 3 documentation on application-level service discovery and fail-oriented design. Clarify how the two service-discovery concepts differ and update the relevant documentation with an explicit explanation; done when the terminology and memory-saving claim are understandable without relying on the screenshots alone.

Written by the indexing model from the issue text.