Update duckdb index files

.gitattributes

@@ -559,3 +559,4 @@ default/outdoors/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/music/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/mathematica/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/photo/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/meta.stackexchange/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/meta.stackexchange/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7632ddcd0f40d3a49328f338fed4ddd433fcf2e7d224f7c86221df2c1cd9fceb
+size 686305280