DCQL: credential sets (identity alternatives)

Scenario

A verifier needs proof of identity and accepts any one of PID, Passport, or Photo ID. The wallet presents whichever the holder has; options are tried in order.

Before you build: run the integrator intake in igrantio-ows-overview - environment, API key, tenancy, backend host, webhooks, frontend - one question at a time, a recommended default with each.