Update duckdb index files

.gitattributes

@@ -76,3 +76,4 @@ ne/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ny/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pa/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 rn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+rw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

rw/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b8f8e1fdde7bf180d2e8b8c9935221a65f45ddedf87202cbab6235f1a895fd2b
+size 359411712