SelfDescriptionMetadata.getUploadDatetime differs after load same SD from sdStore

when SDMeta stored in DB it has date-times as OffsetDateTime instances, but when it is loaded from DB it has Instant date-time instances. reproduced in this test: https://gitlab.com/gaia-x/data-infrastructure-federation-services/cat/fc-service/-/blob/main/fc-service-core/src/test/java/eu/gaiax/difs/fc/core/service/sdstore/impl/SelfDescriptionStoreCompositeTest.java#L103