Lazy Deferred per roomId with a timeout on await. Lets concurrent
joiner sessions block until their host announces the room code
without polling or page scraping.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Establishes the Scenario/Session/Logger/DashboardReporter contracts
the rest of the harness builds on. Deferred is the building block
for RoomCoordinator's host→joiners handoff.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Placeholder runner, tsconfig with @bot alias to tests/e2e/bot,
gitignored .env.stresstest + artifacts. Real behavior follows
in Task 10 onward.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>