Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 abertsch--booksum-fullbooks/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+abertsch--booksum-fullbooks/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

abertsch--booksum-fullbooks/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:84391c038e79dd6dff7cc24f36f6bb3119c5686121e6dc41a7fe633d7e10dc08
+size 144453632