Update duckdb index files

.gitattributes

@@ -52,3 +52,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+open-source-metrics--issues-external/langchain/index.duckdb filter=lfs diff=lfs merge=lfs -text

open-source-metrics--issues-external/langchain/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bef11680500db059d91150ff33b5e654d052ca45842251cd2dffde7d607b0121
+size 1323008