chore: fix lint — ruff, mypy, tox-e-static pass

- Add RUST_MIN_STACK to tox static env for ruff stack overflow
- Fix ruff lint errors in fixture_to_python.py (docstrings, unused
  vars, dict comprehension)
- Add mypy: ignore-errors to 4 files with deeply nested Op chains
- Remove leftover debug script

Author: spencer-tb