Bug on `to_matched_score` - forcing note order is not working properly.

```shell
/partitura/musicanalysis/performance_codec.py", line 660, in <listcomp>
    pitch_onset = [(sn["pitch"].item(), sn["onset_div"].item()) for sn, _ in note_pairs]
ValueError: can only convert an array of size 1 to a Python scalar
```