add state restore after Nanoleaf controller reboots.

internal/drivers/nanoleaf/bridge.go

@@ -207,15 +207,29 @@ func (b *bridge) Run(ctx context.Context, info models.Bridge, ch chan<- models.E
 
 	go func() {
 		ticker := time.NewTicker(time.Second * 5)
+		hadErrors := false
 		for {
 			select {
 			case <-ticker.C:
 			case <-ctx2.Done():
 			}
 
-			err := b.updateEffect(ctx)
+			reqTimeout, cancel := context.WithTimeout(ctx2, time.Second*4)
+			err := b.updateEffect(reqTimeout)
+			cancel()
 			if err != nil {
 				log.Println("Failed to update effects:", err, "This error is non-fatal, and it will be retried shortly.")
+				hadErrors = true
+			} else if hadErrors {
+				b.mu.Lock()
+				for _, panel := range b.panels {
+					panel.Stale = true
+					panel.SlowUpdates = 3
+					panel.TicksUntilSlowUpdate = 10
+				}
+				b.mu.Unlock()
+
+				hadErrors = false
 			}
 		}
 	}()