Merge pull request 'feat: add extensions' (#5910) from tmp/sparkyfitness-3 into main

Reviewed-on: #5910

clusters/cl01tl/helm/sparkyfitness/values.yaml

@@ -62,7 +62,14 @@ sparkyfitness:
     auth:
       existingSecret: sparkyfitness-postgresql-18-cluster-app
 postgres-18-cluster:
-  mode: recovery
+  mode: standalone
+  cluster:
+    initdb:
+      postInitTemplateSQL:
+        - CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+        - CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+        - CREATE EXTENSION IF NOT EXISTS "pg_stat_statements";
+        - GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA public TO "app" WITH GRANT OPTION;
   recovery:
     method: objectStore
     objectStore: