Update duckdb index files

.gitattributes

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

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

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8415d0d82963cc11b39a192abbcc07df09db8a62741b795a1aa16e00e41bb433
+size 3944448