walnuthq/dpm-trace: examples/asset/unittests/daml/FailureDemo.daml

Daml contract source - walnuthq/dpm-trace/examples/asset/unittests/daml/FailureDemo.daml ```daml -- Copyright (c) 2026 Walnut. Apache-2.0. -- -- A DELIBERATELY failing Daml Script test, used to demonstrate how -- `dpm trace test` reports a failure: it maps the failed test back to source -- -- both t