Update duckdb index files

.gitattributes

@@ -3,3 +3,4 @@ junliang--symptom/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 junliang--symptom/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 junliang--symptom/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/test/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 sha256:736adfb82b6cb517a6d1e0a62d7d976be03cbf238a6a6383bea2b46f67b4ae7a
+size 1585152