dev.knotless.putDelegation

Starts delegating the caller's writes to a gateway. The gateway, an OAuth client of the caller's PDS, pushes an authorization request for the caller and answers with the page where the caller approves it; once they do, the gateway keeps the session, replacing any it held, to write on the caller's behalf for collaborators and batched commits. Requires a service token from the caller's PDS, audience the gateway's DID, for this method.