CI sync from nemotron-embed-quant @ eb7223da

.gitattributes

@@ -34,3 +34,6 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
 tokenizer.json filter=lfs diff=lfs merge=lfs -text
+# Local override (issue #603): tokenizer.json is committed as a plain git blob in
+# this source repo (no LFS). Later lines win; HF API uploads ignore this file.
+tokenizer.json -filter -diff -merge text