NotePosition base_sha is nullable
Error fetching MR discussions. Observed error:
notes[0].position.base_sha: invalid type: null, expected a string
Presumably this field should be optional: https://gitlab.kitware.com/utils/rust-gitlab/-/blob/c683dc2ec9029e7b4c4a8e0f5ca18a9c75102109/src/types.rs#L2199