TASK: Add indices to improve parent/child query performance

We did not have any index on the parentnodeanchor,
additionally the anchors should be first, as they are most
likely the most discriminating part of the query, also
position was added, to potentially improve sort queries.

Neos.ContentGraph.DoctrineDbalAdapter/src/DoctrineDbalContentGraphSchemaBuilder.php

@@ -77,7 +77,8 @@ private function createHierarchyRelationTable(): Table
             ->addIndex(['childnodeanchor'])
             ->addIndex(['contentstreamid'])
             ->addIndex(['parentnodeanchor'])
-            ->addIndex(['contentstreamid', 'childnodeanchor', 'dimensionspacepointhash'])
+            ->addIndex(['childnodeanchor', 'contentstreamid', 'dimensionspacepointhash', 'position'])
+            ->addIndex(['parentnodeanchor', 'contentstreamid', 'dimensionspacepointhash', 'position'])
             ->addIndex(['contentstreamid', 'dimensionspacepointhash']);
     }