fix: LOB stream error when processing deployment (#294)

Author: egekocabas

server/application-server/src/main/java/de/tum/cit/aet/helios/deployment/github/GitHubDeploymentSyncService.java

@@ -9,6 +9,7 @@
 import de.tum.cit.aet.helios.gitrepo.GitRepository;
 import de.tum.cit.aet.helios.pullrequest.PullRequest;
 import de.tum.cit.aet.helios.pullrequest.PullRequestRepository;
+import jakarta.transaction.Transactional;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Optional;
@@ -134,6 +135,7 @@ public void syncDeploymentsOfEnvironment(
    *                         DeploymentSource
    * @param environment      the associated environment entity
    */
+  @Transactional
   void processDeployment(
       @NotNull DeploymentSource deploymentSource,
       @NotNull GitRepository gitRepository,