v0.5.1 beta2

this beta comes with an updated model weights for the mosaic restoration model.
it should

1. improve restoration on videos where it previously didn't remove mosaics even though they were detected #23. issue is still present but shows up less often. given these results, there should be some potential left to improve on this a bit more i hope
2. also, slightly less artifacts in certain scenes as i doubled the size of the dataset with a bit more diverse source material

please test it on your sources and let me know if you see any regressions when using these model weights and up-to-date main branch.
download the file and move it to the model_weights directory. then specify this path when running the cli

lada-cli --input mosaic-file.mp4 --output restored-file.mp4  --mosaic-restoration-model-path model_weights/lada_mosaic_restoration_model_generic_v1.2beta.pth