WoW2.Sdk.Backend.Beta.Testing.Messaging

WoW Two backend SDK messaging test harness (beta-forever) — MessagingTestHarness with published / consumed / faulted / dead-lettered assertions over the observer seam, plus an idle-wait primitive that replaces polling sleeps; and SagaTestHarness with state, transition, timeout and optimistic-concurrency assertions over a state-machine saga. References core; reference from test projects only.