BUGFIX: Use reference variable for withoutAuthorizationChecks callback result

Flow's SecurityContext::withoutAuthorizationChecks() has a void return type
and does not return the callback result. The previous implementation assumed
the return value would be passed through, causing $nodeFromContext to always
be null and preventing any nodes from being indexed.

This fix captures the result via a reference variable instead.

Author: gradinarufelix

Classes/Indexer/NodeIndexer.php

@@ -277,9 +277,10 @@ public function indexNode(NodeInterface $node, $targetWorkspace = null): void
         };
 
         $handleNode = function (NodeInterface $node, Context $context) use ($targetWorkspace, $indexer) {
-            $nodeFromContext = $this->securityContext->withoutAuthorizationChecks(
-                function () use ($context, $node) {
-                    return $context->getNodeByIdentifier($node->getIdentifier());
+            $nodeFromContext = null;
+            $this->securityContext->withoutAuthorizationChecks(
+                function () use ($context, $node, &$nodeFromContext) {
+                    $nodeFromContext = $context->getNodeByIdentifier($node->getIdentifier());
                 }
             );
             if ($nodeFromContext instanceof NodeInterface) {