adapt Container usage to new soko-web

src/Repository/MultiRoomRepository.php

@@ -4,20 +4,12 @@ use DateTime;
 use Generator;
 use SokoWeb\Database\Query\Select;
 use MapGuesser\PersistentData\Model\MultiRoom;
-use SokoWeb\PersistentData\PersistentDataManager;
 
 class MultiRoomRepository
 {
-    private PersistentDataManager $pdm;
-
-    public function __construct()
-    {
-        $this->pdm = new PersistentDataManager();
-    }
-
     public function getById(int $id): ?MultiRoom
     {
-        return $this->pdm->selectFromDbById($id, MultiRoom::class);
+        return \Container::$persistentDataManager->selectFromDbById($id, MultiRoom::class);
     }
 
     public function getByRoomId(string $roomId): ?MultiRoom
@@ -25,7 +17,7 @@ class MultiRoomRepository
         $select = new Select(\Container::$dbConnection);
         $select->where('room_id', '=', $roomId);
 
-        return $this->pdm->selectFromDb($select, MultiRoom::class);
+        return \Container::$persistentDataManager->selectFromDb($select, MultiRoom::class);
     }
 
     public function getAllExpired(): Generator
@@ -33,6 +25,6 @@ class MultiRoomRepository
         $select = new Select(\Container::$dbConnection);
         $select->where('updated', '<', (new DateTime('-7 day'))->format('Y-m-d H:i:s'));
 
-        yield from $this->pdm->selectMultipleFromDb($select, MultiRoom::class);
+        yield from \Container::$persistentDataManager->selectMultipleFromDb($select, MultiRoom::class);
     }
 }