Update duckdb index files

.gitattributes

@@ -62,3 +62,4 @@ nord-occidental/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 septentrional/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 valencià/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 central/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+central/train/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text

central/train/partial-index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:894113a216b3995e1647faf37ec33a13a166f8928324bfaef15443af3362d771
+size 5105790976