Merge branch 'OZG-7909-persist-server-data' into 'main'

...ozgcloud/aggregation/data/AggregationDataTestFactory.java

...egation/data/CustomAggregationDataRepositoryImplTest.java

...regation/data/GrpcAggregationDataRequestObserverTest.java

...loud/aggregation/data/GrpcAggregationDataTestFactory.java

...va/de/ozgcloud/aggregation/data/GrpcObjectMapperTest.java

...a/de/ozgcloud/aggregation/data/GrpcObjectTestFactory.java

...de/ozgcloud/aggregation/data/GrpcPropertyTestFactory.java

...ation/data/GrpcSendAggregationDataRequestTestFactory.java

...TA-INF/services/org.junit.jupiter.api.extension.Extension

...nager-server/src/test/resources/junit-platform.properties