Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ alxfgh--Text2Mol/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 alxfgh--Text2Mol/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:45783ddb8bb5ba1b96f9cee07667d0dbbd726695de1ca66f35bc0b0e495581ad
+size 46936064