align pk name with the rest of the schema and add scope id

internal/db/migrations/postgres/04_auth.up.sql

@@ -2,16 +2,17 @@ begin;
 
   -- base table for auth methods
   create table auth_method (
-    auth_method_id wt_public_id primary key
+    public_id wt_public_id primary key,
+    scope_id wt_public_id not null
   );
 
 
   -- base table for auth accounts
   create table auth_account (
-    auth_account_id wt_public_id primary key
+    public_id wt_public_id primary key,
+    scope_id wt_public_id not null
   );
 
-
   create or replace function
     insert_auth_method_subtype()
     returns trigger