[codex] Fix CLI argparse type mismatches in opf.__main__

[romgenie]

Summary

Normalizes Sequence[str] inputs to list[str] before forwarding them into parser helpers in opf/__main__.py.

This fixes pyright/Pylance argument type errors in the unified CLI entrypoint without changing runtime behavior.

Changes

• Convert argv to list[str] | None inside opf.__main__.py:parse_args before calling ArgumentParser.parse_args
• Convert argv to list[str] in the opf eval --help dispatch path before calling opf._eval.args.parse_args

Why

opf.__main__ accepts Sequence[str] for convenience, but the parser helpers it calls are typed as accepting list[str] | None. That produced a static type error in Pylance/pyright even though runtime behavior was fine.

This keeps the public wrapper signatures unchanged and normalizes at the call boundary.

Verification

pyright opf/__main__.py

Result:

0 errors, 0 warnings, 0 informations