Update duckdb index files

.gitattributes

@@ -16,3 +16,4 @@
 *.pth filter=lfs diff=lfs merge=lfs -text
 *.jsonl filter=lfs diff=lfs merge=lfs -text
 lewtun--github-issues/json-train.parquet filter=lfs diff=lfs merge=lfs -text
+lewtun--github-issues/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

lewtun--github-issues/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5bf42a30acac4992e5fce6e92c8b31f5b00fe7d06e1a8ddda03ca672e9faa9c6
+size 12333056