chore(lint): update Ruff ignores for project conventions and maintainability (#1184)

- Added new ignores from flake8-bugbear (`B007`, `B008`)
- Ignored `C901` (high function complexity) for now, pending review
- Maintained PyTorch conventions (`N812`, `N817`)
- Allowed `E731` (lambda assignments) for flexibility
- Consolidated existing ignores (`E402`, `E501`, `F405`, `C408`, `N812`)
- Documented rationale for each ignored rule

This keeps our linting aligned with project needs while tracking
potential fixes.

Signed-off-by: Sébastien Han <seb@redhat.com>

Signed-off-by: Sébastien Han <seb@redhat.com>

llama_stack/cli/stack/_build.py

@@ -141,7 +141,7 @@ def run_stack_build_command(args: argparse.Namespace) -> None:
                 completer=WordCompleter(available_providers),
                 complete_while_typing=True,
                 validator=Validator.from_callable(
-                    lambda x: x in available_providers,
+                    lambda x: x in available_providers,  # noqa: B023 - see https://github.com/astral-sh/ruff/issues/7847
                     error_message="Invalid provider, use <TAB> to see options",
                 ),
             )

llama_stack/cli/tests/test_stack_config.py

@@ -112,7 +112,7 @@ def test_parse_and_maybe_upgrade_config_old_format(old_config):
 
     inference_providers = result.providers["inference"]
     assert len(inference_providers) == 2
-    assert set(x.provider_id for x in inference_providers) == {
+    assert {x.provider_id for x in inference_providers} == {
         "remote::ollama-00",
         "meta-reference-01",
     }