Dspace 2024/1 compatible serialization

[wolf4ood]

Feature Request

Currently the Dspace v08 and 2024/1 serialization uses the same transformers just applying a different namespace.

Some fields are serialized wrongly but the fixes will be applied only in 2024/1 with custom transformers:

Here's the list of the current issues:

• consumerPid and providerPid should be serialized as @id
• participantId in catalog should be serialized as @id
• assigner and assignee in ContractAgreementMessage should be an @id
• state should be an @id in ContractNegotiation and TransferProcess
• endpointType in data address should be an @id
• format and agreementId in TransferRequestMessage should be an @id
• eventType in ContractNegotiationEventMessage should be an @id
• state in JsonObjectFromTransferProcessTransformer should be transformed like the JsonObjectFromContractNegotiationTransformer