Add NetUP IPTV integration module (TV Welcome settings page)

- DB: migrations/002_netup.sql — netup_settings + netup_room_mapping tables
- Backend: routes/netup.ts — GET/PATCH settings, POST test, GET/POST room
  mappings, POST send TV message; notifyNetupCheckin/Checkout helpers
- Backend: bookings PATCH — fire-and-forget NetUP check-in/out on status change
- Frontend: TvWelcomePage — connection settings tab + room mapping tab
- Frontend: sidebarItem added to tv-welcome module (shows in sidebar menu)
- Frontend: ModulesPage Settings button navigates to /tv-welcome
- Frontend: BookingModal — "Сообщение гостю на TV" panel for existing bookings

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/data/modulesData.ts

@@ -156,6 +156,11 @@ export const MODULES_DATA: ModuleDef[] = [
       'Поддержка Samsung SSSP, LG webOS, Android TV',
       'Брендирование под стиль отеля',
     ],
+    sidebarItem: {
+      path: '/tv-welcome',
+      label: 'TV Приветствие',
+      icon: Tv2,
+    },
   },
   {
     id: 'smart-locks',