Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+cw1521--ember2018/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

cw1521--ember2018/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5f8e00697bc0066351d70c230ecf0097549d0a0345497470b3187c7218caf8d8
+size 1645752320