Phase 6: security & ops hardening (T6.1-T6.5)

- T6.1: named rate limiters (api-read/api-write/api-auth/api-webhooks),
  applied per module route group with tighter limits on booking/payment
  writes and the KBZ webhook than read-only catalog/routing endpoints.
- T6.2: install spatie/laravel-activitylog; LogsActivity on Booking/
  Payment/Refund status transitions and catalog/pricing admin CRUD
  (EvCompany, Destination, DepartureTimeSlot, EvRoute, RoutePricing).
  New IdentityPlugin with a read-only AuditLogResource gated by
  view_audit_log.
- T6.3: JSON error envelope for api/* in bootstrap/app.php (401/403/404/
  405/429/500 fallback), plus PaymentGatewayException (422 declined /
  502 unavailable).
- T6.4: feature tests proving the FastAPI agent token gets 403 on
  refund/cancel-not-owned and 405 (no write handler) on catalog/routing
  writes.
- T6.5: install gboquizosanchez/filament-log-viewer with a custom
  Filament admin theme (required for its views' Tailwind classes to
  compile), LOG_CHANNEL/FILAMENT_LOG_VIEWER_DRIVER=daily, registered
  under Operations in the sidebar.

252 tests passing.

app-modules/booking/src/Models/Booking.php

@@ -13,11 +13,26 @@ use Modules\Booking\Enums\BookingStatus;
 use Modules\Catalog\Models\DepartureTimeSlot;
 use Modules\Payment\Models\Payment;
 use Modules\Routing\Models\EvRoute;
+use Spatie\Activitylog\Models\Concerns\LogsActivity;
+use Spatie\Activitylog\Support\LogOptions;
 
 class Booking extends Model
 {
     /** @use HasFactory<BookingFactory> */
-    use HasFactory;
+    use HasFactory, LogsActivity;
+
+    /**
+     * Audit trail on status transitions and driver/vehicle assignment only —
+     * not every column (domain.md §6, §5a; T6.2).
+     */
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logOnly(['status', 'driver_name', 'driver_phone', 'car_plate_number', 'car_model'])
+            ->logOnlyDirty()
+            ->dontLogEmptyChanges()
+            ->useLogName('booking');
+    }
 
     /**
      * @var list<string>