Update duckdb index files

.gitattributes

@@ -157,3 +157,4 @@ default/stats.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/sitecore.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/webmasters.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/cs.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/cstheory.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/cstheory.stackexchange.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:675c929d572228286ff492d26f4b6304317b6b465cef2523789405bdfdeb3d59
+size 2633728