Stop using LFS for ONNX; store model as regular file

Allows push to DynamicDevices fork (GitHub blocks LFS uploads to public forks).

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Alex J Lennon

.gitattributes

@@ -1,7 +1,7 @@
-# Git LFS: track large binaries for sample data and shared models (training/data/ remains in .gitignore)
+# Git LFS: track large binaries for sample data (training/data/ remains in .gitignore).
+# ONNX export stored as regular file to allow push to fork.
 *.flac filter=lfs diff=lfs merge=lfs -text
 *.pt filter=lfs diff=lfs merge=lfs -text
-*.onnx filter=lfs diff=lfs merge=lfs -text
 *.bin filter=lfs diff=lfs merge=lfs -text
 *.wav filter=lfs diff=lfs merge=lfs -text
 *.onnx !text !filter !merge !diff