Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ marccgrau--sbbdata_snr_neg10/parquet-val.parquet filter=lfs diff=lfs merge=lfs -
 marccgrau--sbbdata_snr_neg10/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 marccgrau--sbbdata_snr_neg10/parquet-test.parquet filter=lfs diff=lfs merge=lfs -text
 marccgrau--sbbdata_snr_neg10/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+marccgrau--sbbdata_snr_neg10/val/index.duckdb filter=lfs diff=lfs merge=lfs -text

marccgrau--sbbdata_snr_neg10/val/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9b380c79b9780acd1cd2941e15bbb2fbb1314b9f2c60c7423f96f39d85d745c3
+size 55324672