feat(backend): complete Module 1 auth (register/login/OTP/reset)

Closes Module 1: 9 auth endpoints under /api/v1/auth, OTP via SMS
(Semaphore + log + fake drivers), role middleware, role + admin seeders,
27 feature tests passing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Http/Middleware/EnsureUserHasRole.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Http\Responses\ApiResponse;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureUserHasRole
+{
+    public function handle(Request $request, Closure $next, string ...$roles): Response
+    {
+        $user = $request->user();
+
+        if (! $user) {
+            return ApiResponse::error('Unauthenticated', null, Response::HTTP_UNAUTHORIZED);
+        }
+
+        if (! in_array($user->role, $roles, true)) {
+            return ApiResponse::error('Forbidden — role not permitted', null, Response::HTTP_FORBIDDEN);
+        }
+
+        return $next($request);
+    }
+}