Enhance hCaptcha integration in tests and configuration

- Added hCaptcha site and secret keys to phpunit.xml for testing purposes.
- Updated RegisterTest to configure hCaptcha secret key dynamically, ensuring proper token validation in production environment.

These changes improve the testing setup for hCaptcha, facilitating more accurate simulation of production conditions.

api/phpunit.xml

@@ -27,6 +27,8 @@
     <env name="JWT_SECRET" value="9K6whOetAFaokQgSIdbMQZuJuDV5uS2Y"/>
     <env name="STRIPE_KEY" value="TEST_KEY"/>
     <env name="STRIPE_SECRET" value="TEST_SECRET"/>
+    <env name="H_CAPTCHA_SITE_KEY" value="TEST_SITE_KEY"/>
+    <env name="H_CAPTCHA_SECRET_KEY" value="TEST_SECRET"/>
   </php>
   <source>
     <include>

api/tests/Feature/RegisterTest.php

@@ -77,7 +77,7 @@
 });
 
 it('requires hcaptcha token in production', function () {
-    app()->detectEnvironment(fn () => 'production');
+    config(['services.h_captcha.secret_key' => 'test-key']);
 
     Http::fake([
         ValidHCaptcha::H_CAPTCHA_VERIFY_URL => Http::response(['success' => true])