chore: validate Credentials against Credential Configurations of the Issuer

[Oran-Dan]

Description

We should make sure that UniMe validates that the Credentials it receives correspond with the Credential Configurations in the Issuer's metadata.

Motivation

This is defined by the OID4VCI spec

Resources

No response

To-do List

• Fetch Credential Configuration
• Validate received Credential against Configuration
• Throw error and stop flow if invalid, otherwise simply carry on