Update duckdb index files

.gitattributes

@@ -92,3 +92,4 @@ stepwise/partial-train/0009.parquet filter=lfs diff=lfs merge=lfs -text
 stepwise/partial-validation/0000.parquet filter=lfs diff=lfs merge=lfs -text
 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

gaussian/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eeddb6e6037eed5208bbc32474c9e8b228ac2149b5f26ad547765066c913337d
+size 3056349184