Update duckdb index files

default/{cowdb → train}/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:3af2a8d48d5a724a166e5b37578673de63e6cfee2b4e27a1e3413daa0fca8194
-size 1060864
+oid sha256:ca07bf21ff5dce61a57aa0ad20c33bc0a5d90816fb0784fc14b520859c159db4
+size 2369531904