feat(desfile): add entry reservation model

database/migrations/2026_09_23_010000_create_desfile_entry_reservations_table.php

@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('desfile_entry_reservations', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('variant_id')
+                ->constrained('variantes')
+                ->restrictOnDelete();
+            $table->timestamp('fecha_reserva');
+            $table->decimal('importe', 10, 2)->nullable();
+            $table->string('tipo_pago', 24);
+            $table->timestamps();
+
+            $table->index(['fecha_reserva', 'tipo_pago']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('desfile_entry_reservations');
+    }
+};