ruff

27a315b7 - [red-knot] add fixpoint iteration for Type::member_lookup_with_policy (#17464)

[red-knot] add fixpoint iteration for Type::member_lookup_with_policy (#17464) ## Summary Member lookup can be cyclic, with type inference of implicit members. A sample case is shown in the added mdtest. There's no clear way to handle such cases other than to fixpoint-iterate the cycle. Fixes #17457. ## Test Plan Added test.