Ignore start_pts only for mp3 files

[anjoola]

From the Linear ticket, it looks like we only should be ignoring start_pts < 0.027 for mp3 files. So let's check for that first

[linear[bot]]

ED-19914 Studio sound is ignoring start_pts < 0.027 seconds

[iyaja]

For lining, looks like the version of black and reorder-python-imports in the container are incompatible: https://github.com/psf/black/issues/4175