Version 0.3.25-1 of python-briefcase is marked for autoremoval from testing on Fri 02 Jan 2026. It depends (transitively) on pydantic-core, affected by #1121035. You should try to prevent the removal by fixing these RC bugs.
A new upstream version is available: 0.3.26rc5high
A new upstream version 0.3.26rc5 is available, you should consider packaging it.