I don't plan to release it as it part of an overall "media health" tool I built but you should be able to vibe this pretty easily. I have mine using Whisper to check episodes at intervals throughout to compare against this subtitles and then shift them as needed.

One thing to watch for, make sure it never tries to 2 subtitles at the same time or they will stack in a weird way. It's easy to avoid that but my first pass on a few episodes screwed up the subtitles.

Also, you almost certainly want to extract the subtitles for this work, or at least that's what I did. A combo of pulling out the subtitles in the video file and using OpenSubtitles (VIP) to clean up my media.