Update duckdb index files

.gitattributes

@@ -201,3 +201,4 @@ simuleq/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 singleop/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 singleop/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 singleop/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+svamp_structured/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

svamp_structured/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:560c4571ee63d6f87f5b1d0e4d1fe63f96fa25725133b9e0153f9a36d26c55ca
+size 1060864