Update README.md

Auto-upgrade v3: composite 0.8634 | GLEU 0.7593 | BERTScore 0.9758 | 1-WER 0.8552 | r=16, 256-token ctx, C4-GEC data, faithfulness gate

Add files using upload-large-folder tool

Auto-upgrade: composite 0.8576 | GLEU 0.7506 | BERTScore 0.9733 | 1-WER 0.8488 | r=16, 10 epochs, combined loss

Add files using upload-large-folder tool

Add files using upload-large-folder tool

Add files using upload-large-folder tool

initial commit