feat: 添加E2E测试环境配置支持

添加LOTTERY_E2E环境变量来控制E2E测试相关功能，
包括绕过验证码、登录限制和钱包API URL验证，
同时更新composer.json以包含E2E专用的提供者和服务。

app/Http/Controllers/Api/V1/E2E/E2ECaptchaPeekController.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\E2E;
+
+use App\Services\AdminCaptchaService;
+use App\Support\ApiResponse;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+/**
+ * E2E 辅助：peek captcha bypass 码。
+ *
+ * digest 是 HMAC(app.key) 单向，存进 cache 的就是 digest，无法反查明文。
+ * 改用 e2e 约定：captcha_code == "LOTTERY_E2E_BYPASS" 在 LOTTERY_E2E=true 时视为通过。
+ * 本端点不返回任何"答案"，仅返回约定码提示。
+ */
+final class E2ECaptchaPeekController extends \App\Http\Controllers\Controller
+{
+    public function player(Request $request): JsonResponse
+    {
+        $key = (string) $request->input('captcha_key', '');
+        if ($key === '') {
+            return ApiResponse::error('captcha_key required', 'e2e_invalid_input', null, 422);
+        }
+        return $this->peek($key, AdminCaptchaService::SCOPE_PLAYER);
+    }
+
+    public function admin(Request $request): JsonResponse
+    {
+        $key = (string) $request->input('captcha_key', '');
+        if ($key === '') {
+            return ApiResponse::error('captcha_key required', 'e2e_invalid_input', null, 422);
+        }
+        return $this->peek($key, AdminCaptchaService::SCOPE_ADMIN);
+    }
+
+    private function peek(string $key, string $scope): JsonResponse
+    {
+        return ApiResponse::success([
+            'bypass_code' => 'LOTTERY_E2E_BYPASS',
+            'scope' => $scope,
+            'key' => $key,
+            'hint' => 'POST captcha_code=LOTTERY_E2E_BYPASS to login when LOTTERY_E2E=true',
+        ]);
+    }
+}