Format Python scripts across the repository (#42109)

## Why

The root Python formatting pass only covered `scripts/`, leaving Python utilities elsewhere in the repository outside `just fmt` and `just fmt-check`.

## What changed

- Run the scripts Ruff formatter from the repository root.
- Exclude `sdk/python`, which has its own formatter pass, and `codex-rs/vendor`.
- Apply Ruff formatting to the newly covered Python files and update the formatter coverage test.

GitOrigin-RevId: 73ac82b8bb9c713d589724f6c4f926399febb513

sdk/python/tests/test_artifact_workflow_and_binaries.py

@@ -272,11 +272,11 @@ def test_root_format_driver_covers_all_formatter_groups(
     )
     assert [group.commands[-1].args[-3:] for group in formatters[3:]] == [
         ("ruff", "format", "sdk/python"),
-        ("ruff", "format", "scripts"),
+        ("ruff", "format", "."),
     ]
     assert [group.commands[-1].args[-4:] for group in checks[3:]] == [
         ("ruff", "format", "--check", "sdk/python"),
-        ("ruff", "format", "--check", "scripts"),
+        ("ruff", "format", "--check", "."),
     ]