Add platform admin hosting API for Ladill account provisioning.

Expose authenticated service endpoints for assigning, listing, renewing, and managing hosting accounts from the platform, with tests and deploy docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

bootstrap/app.php

@@ -22,6 +22,7 @@ return Application::configure(basePath: dirname(__DIR__))
         ]);
         $middleware->alias([
             'platform.session' => \App\Http\Middleware\EnsurePlatformSession::class,
+            'auth.service' => \App\Http\Middleware\AuthenticateService::class,
         ]);
 
         // External registrar webhook posts have no CSRF token.