Update duckdb index files

.gitattributes

@@ -94,3 +94,4 @@ stepwise/partial-validation/0001.parquet filter=lfs diff=lfs merge=lfs -text
 stepwise/partial-validation/0002.parquet filter=lfs diff=lfs merge=lfs -text
 gaussian/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 random/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+stepwise/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

stepwise/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:090299d6851520aa947c8caedc6af14b641d04d4247195f4b9338fb5c9400ee9
+size 3054776320