Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ Gxg--HWMP/json-train.parquet filter=lfs diff=lfs merge=lfs -text
 Gxg--HWMP/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Gxg--HWMP/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet 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 sha256:73a2cd5d997306b3b193d70849a0937e4569d41e8536e0a46092dc56acfca3a2
+size 4993024