Xcode 26.4 breaks build with Realm

### How frequently does the bug occur? Always ### Description Updating to the latest Xcode 26.4 (Beta) breaks projects with Realm in it. <img width="1366" height="96" alt="Image" src="https://github.com/user-attachments/assets/6f7facfe-9047-4884-8db9-2d7da9c841fd" /> ### Stacktrace & log output ```shell 'is_pod' cannot be specialized: Users are not allowed to specialize this standard library entity ``` ### Can you reproduce the bug? Always ### Reproduction Steps Try and build a project with Realm Swift ### Version 20.0.3 ### What Atlas Services are you using? Local Database only ### Are you using encryption? No ### Platform OS and version(s) Xcode 26.4 ### Build environment Xcode 26.4 Beta Realm Swift 20.0.3