Add Booking module: model, create/read/cancel API, Filament resource (T4.1-T4.7)

- Booking model with booking_vehicle_options line items (supports mixing
  vehicle options like front_seat + back_seat in one booking), price
  snapshot, status machine, and driver/car assignment fields
- BookingService: front-seat max, disabled-option toggles, duplicate-option
  and whole-vehicle-exclusivity guards
- CreateBookingAction, CancelBookingAction, AssignDriverAction
- BookingRefGenerator: sequential EVB-AAAAA1-style refs via row lock
- POST/GET/cancel booking API endpoints (Sanctum, ownership + admin policy)
- BookingPlugin + Filament BookingResource: list, detail view, Cancel and
  Assign Driver actions (shared between table and detail page)
- domain.md updated for multi-vehicle-option bookings (§2) and driver/
  vehicle assignment (§5a)

app-modules/booking/database/factories/BookingFactory.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Modules\Booking\Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+use Illuminate\Support\Str;
+use Modules\Booking\Enums\BookingChannel;
+use Modules\Booking\Enums\BookingStatus;
+use Modules\Booking\Models\Booking;
+use Modules\Catalog\Models\DepartureTimeSlot;
+use Modules\Routing\Models\EvRoute;
+
+/**
+ * @extends Factory<Booking>
+ */
+class BookingFactory extends Factory
+{
+    protected $model = Booking::class;
+
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'booking_ref' => 'EVB-'.strtoupper(Str::random(6)),
+            'user_id' => null,
+            'openid' => null,
+            'ev_route_id' => EvRoute::factory(),
+            'departure_time_slot_id' => DepartureTimeSlot::factory(),
+            'travel_date' => now()->addDay()->toDateString(),
+            'passenger_name' => $this->faker->name(),
+            'passenger_phone' => $this->faker->phoneNumber(),
+            'pickup_address' => $this->faker->address(),
+            'pickup_lat' => null,
+            'pickup_lng' => null,
+            'dropoff_address' => $this->faker->address(),
+            'dropoff_lat' => null,
+            'dropoff_lng' => null,
+            'price' => $this->faker->randomFloat(2, 5000, 50000),
+            'status' => BookingStatus::PendingPayment,
+            'is_round_trip' => false,
+            'return_travel_date' => null,
+            'created_by_channel' => BookingChannel::MiniApp,
+            'driver_name' => null,
+            'driver_phone' => null,
+            'car_plate_number' => null,
+            'car_model' => null,
+        ];
+    }
+}