fix(container): Log the deprecation to the app when possible

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/private/AppFramework/DependencyInjection/DIContainer.php

@@ -63,7 +63,7 @@ use Psr\Container\ContainerInterface;
 use Psr\Log\LoggerInterface;
 
 class DIContainer extends SimpleContainer implements IAppContainer {
-	private string $appName;
+	protected string $appName;
 	private array $middleWares = [];
 	private ServerContainer $server;
 

lib/private/AppFramework/Utility/SimpleContainer.php

@@ -196,7 +196,9 @@ class SimpleContainer implements ArrayAccess, ContainerInterface, IContainer {
 		$this->registerService($alias, function (ContainerInterface $container) use ($target, $alias): mixed {
 			try {
 				$logger = $container->get(LoggerInterface::class);
-				$logger->debug('The requested alias "' . $alias . '" is deprecated. Please request "' . $target . '" directly. This alias will be removed in a future Nextcloud version.', ['app' => 'serverDI']);
+				$logger->debug('The requested alias "' . $alias . '" is deprecated. Please request "' . $target . '" directly. This alias will be removed in a future Nextcloud version.', [
+					'app' => $this->appName ?? 'serverDI',
+				]);
 			} catch (ContainerExceptionInterface $e) {
 				// Could not get logger. Continue
 			}