Update repository references to B-A-M-N username

- Updated all markdown files
- Added large manifest files to gitignore

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: B-A-M-N

.gitignore

@@ -84,3 +84,4 @@ checkpoint-*/
 runs/
 wandb/
 manifests/global_seen_hashes.json
+manifests/*.json