refactor: implement centralized cache key management and add utility traits for vCenter SSH operations.

app/Providers/MailConfigServiceProvider.php

@@ -4,6 +4,7 @@ namespace App\Providers;
 
 use App\Http\Facade\SignRSA;
 use App\Models\Setting;
+use App\Support\Cache\CacheKey;
 use Illuminate\Support\Facades\App;
 use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\Config;
@@ -23,7 +24,7 @@ class MailConfigServiceProvider extends ServiceProvider
             return;
         }
 
-        $config = Cache::remember('mail_config', 3600, function () {
+        $config = Cache::remember(CacheKey::build('settings', 'mail'), 3600, function () {
             if (!Schema::hasTable('setting')) {
                 return null;
             }