feat(authorization): add roles and permissions models, migration, and tests

database/migrations/2026_07_28_000000_create_roles_and_permissions_tables.php

@@ -0,0 +1,53 @@
+<?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('permisos', function (Blueprint $table): void {
+            $table->id();
+            $table->string('codigo')->unique();
+            $table->string('nombre');
+            $table->text('descripcion')->nullable();
+            $table->timestamps();
+        });
+
+        Schema::create('roles', function (Blueprint $table): void {
+            $table->id();
+            $table->string('codigo')->unique();
+            $table->string('nombre');
+            $table->text('descripcion')->nullable();
+            $table->timestamps();
+        });
+
+        Schema::create('roles_permisos', function (Blueprint $table): void {
+            $table->id();
+            $table->string('codigo_permiso');
+            $table->string('rol_codigo');
+            $table->timestamps();
+
+            $table->foreign('codigo_permiso')
+                ->references('codigo')
+                ->on('permisos')
+                ->cascadeOnUpdate()
+                ->cascadeOnDelete();
+            $table->foreign('rol_codigo')
+                ->references('codigo')
+                ->on('roles')
+                ->cascadeOnUpdate()
+                ->cascadeOnDelete();
+            $table->unique(['rol_codigo', 'codigo_permiso']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('roles_permisos');
+        Schema::dropIfExists('roles');
+        Schema::dropIfExists('permisos');
+    }
+};