feat: more grants to supabase_etl_admin

Author: soedirgo

migrations/db/init-scripts/00000000000000-initial-schema.sql

@@ -12,6 +12,8 @@ create user supabase_replication_admin with login replication;
 
 -- Supabase etl user
 create user supabase_etl_admin with login replication;
+grant pg_read_all_data to supabase_etl_admin;
+grant create on database postgres to supabase_etl_admin;
 
 -- Supabase read-only user
 create role supabase_read_only_user with login bypassrls;