Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ kqsong--OASum/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 kqsong--OASum/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/partial-test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c3720e0d7351ab150ec56662e6f5487475dd5d8dd022a2f7338cbc212a277fc3
+size 8065134592