Update duckdb index files

.gitattributes

@@ -86,3 +86,4 @@ ro/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ro/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 all/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cs/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

cs/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f5bf2de59f242cb2ed3f5b4d8d86a5d3ce58feffbb7f5f9637f01b105bdbefff
+size 6886797312