add pg_net, pg_cron, and supabase_vault extensions for worker management

Author: jumski

pkgs/core/schemas/0010_extensions.sql

@@ -1,2 +1,12 @@
 -- Extensions must be created first
 create extension if not exists pgmq;
+
+-- Extensions for worker management
+-- pg_net: HTTP requests from SQL (for pinging edge functions)
+create extension if not exists pg_net;
+
+-- supabase_vault: Secure credential storage (service role key, base URL)
+create extension if not exists supabase_vault;
+
+-- pg_cron: Scheduled job execution (ensure_workers cron)
+create extension if not exists pg_cron;