fix: e2e failures on the device: edit replies before their events, /ws closed on reboot

- runModelEdit sent an edit's events (room, roomRemoved, the orders,
  repeaters) before its reply, where PROTOCOL.md says they follow it. A
  client waiting for the reply read past them (test_adding_and_deleting_a_room).
- A restart dropped the /ws connections without a close, so clients never
  saw them go (test_reboot). ESPNetwork::end() now closes them too.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/outputs/ProtoSocket.cpp

@@ -415,6 +415,7 @@ void ProtoSocket::begin(AsyncWebServer &server) {
   ws.onEvent(ProtoSocket::wsEvent);
   server.addHandler(&ws);
 }
+void ProtoSocket::end() { ws.closeAll(1001, "Restarting"); }
 bool ProtoSocket::hasClients() const {
   for(const proto_slot_t &s : slots)
     if(s.clientId.load()) return true;