- Invalid audio rows (bad path or sample-rate mismatch) no longer
increment valid_samples; has_error is now set on any audio failure
- _check_audio_file now enforces the expected sample rate when soundfile
is available, making --sample-rate actually useful
- ref_audio missing-file warning is emitted for every invalid entry
independently, not only before the first valid one is seen
- New tests cover each of the four corrected behaviours: invalid audio
count, sample-rate mismatch, mixed ref_audio, and CLI exit code
supermario_leo
4509becfde