Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 amitness--sentiment-mt/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+amitness--sentiment-mt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

amitness--sentiment-mt/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:716653d11c9e53cca2580824a8208a534c9ee3a4005243e5f3ddba5da151edef
+size 1060864