Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ 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
 users.csv filter=lfs diff=lfs merge=lfs -text
+fast-flash--fast-flash-hackernews-users/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

fast-flash--fast-flash-hackernews-users/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c77d0b54a41045ea8de2f56c206a2e62e0a6134717bd9cd59dde8ca89f899641
+size 320090112