Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 Summarization[[:space:]]Part[[:space:]]Data/summarization_optimization-validation.parquet filter=lfs diff=lfs merge=lfs -text
 Summarization[[:space:]]Part[[:space:]]Data/summarization_optimization-train.parquet filter=lfs diff=lfs merge=lfs -text
 Summarization[[:space:]]Part[[:space:]]Data/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Summarization[[:space:]]Part[[:space:]]Data/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

Summarization Part Data/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:96b89c3452f12d0798909b2f9c5d382abb8d9c7b885eea774aa9d8db5e5a22b1
+size 311701504