fix: app_releases 스토리지 경로를 API 공유 경로로 수정

- /var/www/shared-storage/releases → /var/www/api/storage/app/releases
- Docker 볼륨 마운트와 일치하도록 수정

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

config/filesystems.php

@@ -68,7 +68,7 @@
 
         'app_releases' => [
             'driver' => 'local',
-            'root' => env('APP_RELEASES_PATH', '/var/www/shared-storage/releases'),
+            'root' => env('APP_RELEASES_PATH', '/var/www/api/storage/app/releases'),
             'visibility' => 'private',
             'throw' => false,
             'report' => false,