Fix RBAC, user creation and update components

server/db/init/00_auth_shim.sql

@@ -30,6 +30,7 @@ create table if not exists auth.users (
   email           citext unique,
   password_hash   text not null,
   full_name       text,
+  is_system_admin boolean not null default false,
   is_active       boolean not null default true,
   created_at      timestamptz not null default now(),
   last_login_at   timestamptz