Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 causal-lm--ConvAI/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 causal-lm--ConvAI/validation/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 sha256:15ae4a14444298c6957e6a350f2b68a20a5fde4e68de03055c8542b4a3be8a48
+size 155201536