Windows executable detection tries to run 'python3.exe.__target__' etc

[DuncanMackintosh]

I only noticed this because our endpoint protection was blocking the execution and spamming me with popups about it, without that I suspect the impact is minimal but it's just wasting a bit of time.

The new Python Install Manager stores .exe.__target__ files in %LOCALAPPDATA%\python\bin, which is on %PATH% so gets searched - they're just text files containing the full path of a python executable.

pet picks them up and tries to run them, which naturally fails:

C:\Users\<user>\.vscode\extensions\ms-python.vscode-python-envs-1.36.0-win32-x64\python-env-tools\bin>pet.exe find
   0.385683000s ERROR pet_python_utils::env: Failed to spawn Python to resolve info "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python.exe.__target__": %1 is not a valid Win32 application. (os error 193)
   0.385896600s  WARN pet::find: Unknown Python Env "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python.exe.__target__"
   0.725347200s ERROR pet_python_utils::env: Failed to spawn Python to resolve info "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python3.12.exe.__target__": %1 is not a valid Win32 application. (os error 193)
   0.725571600s  WARN pet::find: Unknown Python Env "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python3.12.exe.__target__"
   1.071780100s ERROR pet_python_utils::env: Failed to spawn Python to resolve info "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python3.14.exe.__target__": %1 is not a valid Win32 application. (os error 193)
   1.071980800s  WARN pet::find: Unknown Python Env "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python3.14.exe.__target__"
   1.438984900s ERROR pet_python_utils::env: Failed to spawn Python to resolve info "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python3.exe.__target__": %1 is not a valid Win32 application. (os error 193)
   1.439173200s  WARN pet::find: Unknown Python Env "C:\\Users\\<user>\\AppData\\Local\\python\\bin\\python3.exe.__target__"

I'm guessing this is down to the lack of a trailing $ on the WINDOWS_EXE regex in crates/pet-python-utils/src/executable.rs but I don't know if that's intentional.

Presumably this will be more common as people migrate to the new Install Manager so probably worth excluding them from the search one way or another.