uv cannot find its own free-threaded Python when installing tools

```
$ uv python install 3.13t
Searching for Python versions matching: Python 3.13t
Installed Python 3.13.0 in 4.20s
 + cpython-3.13.0+freethreaded-macos-aarch64-none
$ UV_PYTHON_DOWNLOADS=manual UV_PYTHON_PREFERENCE=only-managed uv tool install nox 
error: No interpreter found in managed installations
$ uv --version           
uv 0.4.25 (97eb6ab4a 2024-10-21)
$ uname   
Darwin
```
