Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ stackmathqa1600k/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 stackmathqa200k/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 stackmathqa400k/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 stackmathqa800k/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+preprocessed-qalist/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

preprocessed-qalist/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eb70096b7d8296f08a3edd85dfa8fa88f16ffd3e155c155a7caf7e7cd465cadb
+size 6139949056