Persist credential issuer offers and support retry of delivery

[reinkrul]

We need to store the OpenID4VCI issuance of credentials.

Things we need to store:

• Initiator (issuer/holder); will always be issuer for now
• Status (offered/requested/retrieved); will always be offered or retrieved for now
• Issuer DID
• Holder DID
• Grants, including parameters (generated pre-authorized code)
• Arbitrary number of nonces
• Arbitrary number of access tokens (or just 1) and expiry
• Created timestamp
• Expiry/NotAfter timestamp
• RetrievedOn timestamp
• Credential definition
• Issued credential (ID) after it has been requested by the wallet

[reinkrul]

Entity Relationship Diagram of things to store and configure:

[woutslakhorst]

where would the relation with the pre-auth code be stored? (short lived)

[woutslakhorst]

Make sure to refresh the pre-auth token on retry

[woutslakhorst]

persistence and guaranteed delivery is for phase 2

[reinkrul]

server-to-server OpenID4VCI will be removed