NodeInterruptionNotice

The worker on node_id has been told by its provider that the node is being reclaimed (worker.proto InterruptionNotice, relayed unchanged; the node id is stamped from the stream it arrived on). deadline is absent for a rebalance recommendation. The daemon also tags the node interruption=<kind> ("spotInterruption" / "rebalanceRecommendation") so a client that hydrates from ListNodes sees the notice too.