TASK: Move transactional logic _on_ projection as it does not belong …

…to the subscription store

... which technically only coincidentally uses the same connection and dbal instance

see neos/neos-development-collection#5321 (comment)

src/Domain/Projection/HypergraphProjection.php

@@ -40,6 +40,7 @@
 use Neos\ContentRepository\Core\Feature\SubtreeTagging\Event\SubtreeWasTagged;
 use Neos\ContentRepository\Core\Feature\SubtreeTagging\Event\SubtreeWasUntagged;
 use Neos\ContentRepository\Core\Infrastructure\DbalSchemaDiff;
+use Neos\ContentRepository\Core\Infrastructure\ProjectionTransactionTrait;
 use Neos\ContentRepository\Core\Projection\ContentGraph\ContentGraphProjectionInterface;
 use Neos\ContentRepository\Core\Projection\ContentGraph\ContentGraphReadModelInterface;
 use Neos\ContentRepository\Core\Projection\ProjectionStatus;
@@ -52,6 +53,8 @@
  */
 final class HypergraphProjection implements ContentGraphProjectionInterface
 {
+    use ProjectionTransactionTrait;
+
     use ContentStreamForking;
     use NodeCreation;
     use SubtreeTagging;