format: fix psr12 style issues

phpcbf auto-fixes: string concatenation spacing, single-line class braces, closing brace placement.

backend/app/Auth/UseCases/Logout/Logout.php

@@ -8,7 +8,8 @@ class Logout
 {
     public function __construct(
         private SessionRepository $sessionRepo,
-    ) {}
+    ) {
+    }
 
     public function execute(string $token): void
     {