test: error messages from Godot when tests exit

During local testing (on a Windows box) with AutoInject.Tests, at the time Godot exits, I get an error reading:

CLR: Assert failure(PID 9412 [0x000024c4], Thread: 27244 [0x6a6c]): !"Attempt to execute managed code after the .NET runtime thread state has been destroyed."
    File: D:\a\_work\1\s\src\coreclr\vm\ceemain.cpp:1818 Image:
C:\Users\Mark\AppData\Roaming\godotenv\godot\bin\godot.exe

This error doesn't occur in the Ubuntu VM for the GH workflow, but there it reports:

WARNING: 13 RIDs of type "CanvasItem" were leaked.
     at: _free_rids (servers/rendering/renderer_canvas_cull.cpp:2678)
WARNING: ObjectDB instances leaked at exit (run with --verbose for details).
     at: cleanup (core/object/object.cpp:2514)

Start with the AutoInject.Tests test run and reproduce the reported shutdown output on Windows and in the Ubuntu VM. Compare the Godot CLR assertion with the CanvasItem and ObjectDB leak warnings; done means identifying the test or shutdown path responsible and confirming clean exits in both environments.