Add stubbed job_id

So that we can get a better sense of what the URLs look like.

Leaving unsigned for now because we don’t know if the ID will be a string or int
or…

tests/app/main/views/test_sms.py

@@ -105,4 +105,4 @@ def test_should_redirect_to_job(notifications_admin, notifications_admin_db,
         response = client.post('/123/sms/check')
 
         assert response.status_code == 302
-        assert response.location == 'http://localhost/123/jobs/job'
+        assert response.location == 'http://localhost/123/jobs/456'