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
+maximalmargin--mitchell/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

maximalmargin--mitchell/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f2f2afc500032dd3c359f75c17ea4c8a47779117ce9b0d775c879713bd539b7d
+size 23080960