Update duckdb index files

.gitattributes

@@ -103,3 +103,4 @@ default/real_estate_broker/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/financial_analyst/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/metal_worker/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/coach/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/purchasing_agent/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/purchasing_agent/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6d267d49b9fcb423dfa1f1f51d9747ad987ac659321d69160eed120afd5f4a74
+size 4468736