Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 ELTE-DH--PWKP_cleaned/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ELTE-DH--PWKP_cleaned/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ELTE-DH--PWKP_cleaned/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ELTE-DH--PWKP_cleaned/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f51650a1d13ee3432cd3cfc7fb553733ad50109630a55cf31834ecbcd5446ca5
+size 25964544