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
 ursum.csv filter=lfs diff=lfs merge=lfs -text
+mwz--ursum/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

mwz--ursum/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1aba320e6986b5b8fd75fc6a6754c480e733b4cfe20e6b1edbde077413aa4445
+size 250097664