fix: update DeleteCron to remove deleted lists

Signed-off-by: Luka Trovic <luka@nextcloud.com>

lib/Db/StackMapper.php

@@ -164,4 +164,15 @@ class StackMapper extends DeckMapper implements IPermissionMapper {
 
 		return $result !== false ? $result : null;
 	}
+
+	public function findToDelete(): array {
+		// add buffer of 5 min
+		$timeLimit = time() - (60 * 5);
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from($this->getTableName())
+			->where($qb->expr()->neq('deleted_at', $qb->createNamedParameter(0, IQueryBuilder::PARAM_INT)))
+			->andWhere($qb->expr()->lt('deleted_at', $qb->createNamedParameter($timeLimit, IQueryBuilder::PARAM_INT)));
+		return $this->findEntities($qb);
+	}
 }