Bug: Python plugin ignores workspace-level `venvArgs` and `syncArgs`

**Problem** The settings `unstable_uv.venvArgs` and `unstable_uv.syncArgs` in `.moon/toolchains.yml` are not applied for project setup/install actions. My use case is that I want to add `--all-extras` to `syncArgs` so that the environment is created with all of the projects's extras defined in `pyproject.toml`. **Minimal reproducible example** ```yml # .moon/toolchains.yml unstable_python: version: "3.14" packageManager: uv unstable_uv: version: 0.10.9 venvArgs: - "--clear" syncArgs: - "--all-extras" # .moon/tasks/all.yml tasks: lint: command: "[some command like ruff check]" ``` Running with `--log debug` shows that the fallback args are being used, instead of the configured args: ```sh uv venv .venv --no-managed-python --no-python-downloads --no-progress uv sync --no-managed-python --no-python-downloads --no-progress ``` **Workaround** I only get the expected behavior if I duplicate the args in each project's `moon.yml` (`toolchains.unstable_uv`).