[TASK] Use Connection instead of PDO

In Doctrine DBAL v4, as described in the [documentation](https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Database/QueryBuilder/Index.html#database-query-builder-create-named-parameter), support for using the `\PDO::PARAM_*` constants has been dropped in favor of the enum types. This should be migrated to `Connection::PARAM_*` in order to be compatible with TYPO3 v13 later on. `Connection::PARAM_*` can already be used now as it is compatible with TYPO3 11 and 12.

Classes/Domain/Repository/CacheRepository.php

@@ -6,6 +6,7 @@
 
 use SFC\Staticfilecache\Service\ConfigurationService;
 use SFC\Staticfilecache\Service\DateTimeService;
+use TYPO3\CMS\Core\Database\Connection;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /**
@@ -23,7 +24,7 @@ public function findExpiredIdentifiers(): array
  ->from($this->getTableName())
  ->where($queryBuilder->expr()->lt(
  'expires',
- $queryBuilder->createNamedParameter((new DateTimeService())->getCurrentTime(), \PDO::PARAM_INT)
+ $queryBuilder->createNamedParameter((new DateTimeService())->getCurrentTime(), Connection::PARAM_INT)
  ))
  ->groupBy('identifier')
  ->executeQuery()