[BUGFIX] Allow initializer interface in event

AfterIndexQueueHasBeenInitializedEvent requires AbstractInitializer
instead of the interface IndexQueueInitializer, this prevents the
usage of own implementations not based on the abstract initializer,
e.g. an initializer for external data.

By requiring the interface instead of the AbstractInitializer this
issue is fixed.

Resolves: #4402

Author: dkd-friedrich

Classes/Event/IndexQueue/AfterIndexQueueHasBeenInitializedEvent.php

@@ -18,7 +18,7 @@
 namespace ApacheSolrForTypo3\Solr\Event\IndexQueue;
 
 use ApacheSolrForTypo3\Solr\Domain\Site\Site;
-use ApacheSolrForTypo3\Solr\IndexQueue\Initializer\AbstractInitializer;
+use ApacheSolrForTypo3\Solr\IndexQueue\Initializer\IndexQueueInitializer;
 
 /**
  * PSR-14 Event which is fired after a index queue has been (re-) initialized.
@@ -29,15 +29,15 @@
 final class AfterIndexQueueHasBeenInitializedEvent
 {
     public function __construct(
-        private readonly AbstractInitializer $initializer,
+        private readonly IndexQueueInitializer $initializer,
         private readonly Site $site,
         private readonly string $indexingConfigurationName,
         private readonly string $type,
         private readonly array $indexingConfiguration,
         private bool $isInitialized,
     ) {}
 
-    public function getInitializer(): AbstractInitializer
+    public function getInitializer(): IndexQueueInitializer
     {
         return $this->initializer;
     }