Make DidManagementApi more explicit

[paullatzelsperger]

Feature Request

The DidManagementApi will undergo the following changes:

• remove all mutating endpoints except publish and unpublish
• add endpoints to modify specific properties, e.g. serviceEndpoints:
  • PATCH /dids/endpoint: body contains the DID and the service endpoint to replace. Returns a 400 if the endpoint does not exist exists
  • DELETE /dids/endpoint: body contains the DID and the service endpoint ID to remove. Returns a 400 if the endpoint does not exist.
  • POST /dids/endpoint: body contains the DID and the service endpoint ro add. Returns a 409 if the same endpoint already exists.

Which Areas Would Be Affected?

DID management API

Why Is the Feature Desired?

DIDs are managed items, the are a mere representation of a participant, so modifying them directly should not be possible. The "single source of truth" must
always be the DidResource which we hold in the database.

More specific endpoints, avoid the danger of completely overwriting a DID.

Solution Proposal

If possible, provide a (brief!) solution proposal.