Update duckdb index files

.gitattributes

@@ -17,3 +17,4 @@ summarization/lbox_open-test.parquet filter=lfs diff=lfs merge=lfs -text
 summarization_plus/lbox_open-validation.parquet filter=lfs diff=lfs merge=lfs -text
 summarization_plus/lbox_open-train.parquet filter=lfs diff=lfs merge=lfs -text
 summarization_plus/lbox_open-test.parquet filter=lfs diff=lfs merge=lfs -text
+casename_classification/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

casename_classification/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b35677be4b92bf3e55ad1a073cdce03527d2141376b85d5eea3dfd814193ddea
+size 19410944