[CORE][Event] Make all events return \EventResult, enforced at container build time

plugins/FileQuota/FileQuota.php

@@ -31,6 +31,7 @@ use App\Core\Modules\Plugin;
 use App\Util\Common;
 use App\Util\Exception\ClientException;
 use App\Util\Exception\ServerException;
+use EventResult;
 
 /**
  * Check attachment file size quotas
@@ -57,7 +58,7 @@ class FileQuota extends Plugin
      * @throws ClientException
      * @throws ServerException
      */
-    public function onEnforceUserFileQuota(int $filesize, int $user_id): bool
+    public function onEnforceUserFileQuota(int $filesize, int $user_id): EventResult
     {
         $query = <<<'END'
             select sum(at.size) as total
@@ -104,7 +105,7 @@ class FileQuota extends Plugin
      *
      * @return bool true hook value
      */
-    public function onPluginVersion(array &$versions): bool
+    public function onPluginVersion(array &$versions): EventResult
     {
         $versions[] = [
             'name'     => 'FileQuota',