Records why the werkbak polls rather than being pushed to (proposal #163):
nothing notifies the BFF either, so SSE/WebSockets would poll the domain
inside the BFF for the same freshness plus connection state, a dependency and
a stateful BFF. Names the ceiling (fixed 5s interval, per open page, keeps
polling in a hidden tab) and the upgrade path (publish task events, then swap
the interval for a stream).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>