feat: auto-create guest in CRM on booking creation

- Add upsertGuestFromBooking() service — creates or updates guest record
  when a booking is made (matches by email/phone, creates if not found)
- Integrated into bookings.ts (manual PMS bookings) and publicWidget.ts
  (online widget bookings)
- Name parsed as Russian format: "Фамилия Имя [Отчество]"
- Non-throwing: booking creation never fails due to guest upsert errors

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

backend/src/routes/publicWidget.ts

@@ -2,6 +2,7 @@ import { FastifyPluginAsync } from 'fastify'
 import { db } from '../db'
 import { getGatewayForModule } from './paymentGateways'
 import { createCharge } from '../services/yookassa'
+import { upsertGuestFromBooking } from '../services/guestUpsert'
 
 type SlugParam = { Params: { slug: string } }
 type SlugIdParam = { Params: { slug: string; bookingId: string } }
@@ -456,6 +457,14 @@ const publicWidget: FastifyPluginAsync = async (fastify) => {
     await db.query('UPDATE online_bookings SET booking_id = $1 WHERE id = $2',
       [bookingId, onlineBookingId])
 
+    // Auto-create/update guest in CRM
+    upsertGuestFromBooking({
+      hotelId: hotel.id,
+      guestName,
+      guestEmail,
+      guestPhone,
+    })
+
     if (paymentMethod === 'yookassa') {
       // Create YooKassa payment
       try {