Update duckdb index files

.gitattributes

@@ -52,3 +52,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+foldl--99problems/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

foldl--99problems/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c64cbffb67ab8a562cd1e23860c9ade3d12df955dc44350b0afb76700ce79688
+size 1847296