feat(users): add event_id to users table and update related resources

tests/Feature/Migrations/AddEventIdToUsersTest.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Tests\Feature\Migrations;
+
+use App\Domains\Core\Administrator\Resources\AdministratorResource;
+use App\Domains\Core\Auth\Models\User;
+use App\Domains\Core\Auth\Resources\UserResource;
+use Illuminate\Database\QueryException;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Tests\TestCase;
+
+class AddEventIdToUsersTest extends TestCase
+{
+    public function test_event_assignment_preserves_existing_users_and_restricts_event_deletion(): void
+    {
+        Schema::create('events', function (Blueprint $table): void {
+            $table->id();
+        });
+        Schema::create('users', function (Blueprint $table): void {
+            $table->id();
+            $table->string('tenant_codigo')->nullable();
+            $table->softDeletes();
+            $table->timestamps();
+        });
+        DB::table('users')->insert(['id' => 1, 'tenant_codigo' => 'legacy']);
+        DB::table('events')->insert(['id' => 42]);
+
+        $migration = require database_path('migrations/2026_10_01_000000_add_event_id_to_users_table.php');
+        $migration->up();
+
+        $legacy = User::query()->findOrFail(1);
+        $this->assertNull($legacy->event_id);
+        $this->assertNull($legacy->event);
+        $this->assertSame('legacy', $legacy->tenant_codigo);
+
+        $legacy->update(['event_id' => '42']);
+        $user = $legacy->fresh();
+        $this->assertSame(42, $user->event_id);
+        $this->assertSame(42, $user->event->id);
+        $this->assertSame(42, UserResource::make($user)->resolve(new Request)['event_id']);
+        $this->assertSame(42, AdministratorResource::make($user)->resolve(new Request)['event_id']);
+
+        try {
+            DB::table('events')->where('id', 42)->delete();
+            $this->fail('An assigned event must not be deleted.');
+        } catch (QueryException $exception) {
+            $this->assertStringContainsString('FOREIGN KEY', $exception->getMessage());
+        }
+
+        $migration->down();
+        $this->assertFalse(Schema::hasColumn('users', 'event_id'));
+        $this->assertSame('legacy', DB::table('users')->where('id', 1)->value('tenant_codigo'));
+    }
+}