Update duckdb index files

.gitattributes

@@ -3,3 +3,4 @@ yoshitomo-matsubara--srsd-feynman_medium/text-test.parquet filter=lfs diff=lfs m
 yoshitomo-matsubara--srsd-feynman_medium/text-validation.parquet filter=lfs diff=lfs merge=lfs -text
 yoshitomo-matsubara--srsd-feynman_medium/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 yoshitomo-matsubara--srsd-feynman_medium/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+yoshitomo-matsubara--srsd-feynman_medium/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

yoshitomo-matsubara--srsd-feynman_medium/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:42b3adbb61621a0ff1596b9cdb422a00c4de600078c5eebb97b9b73d1cfe452a
+size 3158016