uv

7dc32266 - Concurrent progress bars (#3252)

Concurrent progress bars (#3252) ## Summary Implements concurrent progress bars. Resolves https://github.com/astral-sh/uv/issues/1209. ## Test Plan https://github.com/astral-sh/uv/assets/34988408/b21bdfbb-8817-4873-a65c-16c9e8c7c460