uv

d3e50a23 - Enable `--all-packages --frozen` in `uv sync` and `uv export` (#8760)

Enable `--all-packages --frozen` in `uv sync` and `uv export` (#8760) ## Summary This PR improves the interaction of `--frozen` such that we reduce the dependency on the `pyproject.toml` and increase the dependency on the `uv.lock`. Specifically, we now read the list of workspace members from the `uv.lock` rather than the `pyproject.toml`, which means we don't need to discover the member `pyproject.toml` files in order to perform a `uv sync --frozen --all-packages`.