Update duckdb index files

.gitattributes

@@ -1,2 +1,3 @@
 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 Part Data/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c5f7b5d8121cb1585f55d07520511e82351ac50b81af688f96f909bfe7d169fb
+size 78393344