Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 nahyeon00--stackoverflow/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 nahyeon00--stackoverflow/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+nahyeon00--stackoverflow/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

nahyeon00--stackoverflow/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e9ea235eeb998238f55c6f307328114b6bfde0f612821948ba42d8555d086f38
+size 1847296