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>

backend/src/app.ts

@@ -15,6 +15,7 @@ import bookingsRoutes    from './routes/bookings'
 import housekeepingRoutes from './routes/housekeeping'
 import channelsRoutes    from './routes/channels'
 import usersRoutes       from './routes/users'
+import netupRoutes       from './routes/netup'
 
 export async function buildApp() {
   const fastify = Fastify({
@@ -32,7 +33,7 @@ export async function buildApp() {
   await fastify.register(cors, {
     origin: config.cors.origins,
     credentials: true,
-    methods: ['GET', 'POST', 'PATCH', 'DELETE', 'OPTIONS'],
+    methods: ['GET', 'POST', 'PATCH', 'PUT', 'DELETE', 'OPTIONS'],
   })
 
   await fastify.register(rateLimit, {
@@ -71,6 +72,7 @@ export async function buildApp() {
   await fastify.register(housekeepingRoutes)
   await fastify.register(channelsRoutes)
   await fastify.register(usersRoutes)
+  await fastify.register(netupRoutes)
 
   return fastify
 }