Update duckdb index files

.gitattributes

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

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

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b218296c591b8b943954b0b28e6b832bc7423c94f2e43378d9e55bea324c579
+size 2371584