Update duckdb index files

.gitattributes

@@ -62,3 +62,4 @@ cs_pdt-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_parcorfull-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_parcorfull-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_potsdamcc-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+de_potsdamcc-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

de_potsdamcc-corefud/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d347453779599cd24dd0bdc2f6aef6b82714d4a1d6c38d95fa6298dcaeb313a7
+size 1323008