webui-auth-edge: auth handler does not fail closed when handle() rejects #115

In packs/kirocrew/webui-auth-edge/index.js line 167, the code is return auth.handle(event); with no await.

If handle() rejects, the catch block does not run. Thus the function does not send the 503 "fail closed" response.

Fix: use return await auth.handle(event);.

Found by a static read of the code at commit 1f66a8f. The code was not run.