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
+society-ethics--papers/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

society-ethics--papers/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eba52960eaa8acf4f67276d4c14deb4991a154dbf20839b8ad1b31b0da8fc489
+size 1060864