Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 poquad/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+poquad/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

poquad/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:426be6a6f773098a2703ddfd4b9741a2428eb9ff395b5d105d8781bda0c4493f
+size 97529856