feat(ticket): implement ticket generation service, model, and exception handling with tests

database/migrations/2026_07_21_000000_create_tickets_table.php

@@ -0,0 +1,34 @@
+<?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('tickets', function (Blueprint $table): void {
+            $table->id();
+            $table->string('tenant_code');
+            $table->uuid('ticket');
+            $table->string('name');
+            $table->text('description');
+            $table->dateTime('starts_at')->nullable();
+            $table->dateTime('expires_at')->nullable();
+            $table->dateTime('used_at')->nullable();
+            $table->foreignId('user_id')->constrained()->cascadeOnUpdate()->restrictOnDelete();
+
+            $table->foreign('tenant_code')
+                ->references('codigo')
+                ->on('tenants')
+                ->cascadeOnUpdate()
+                ->restrictOnDelete();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('tickets');
+    }
+};