a device's history is not a scan request (V-554)

Found verifying the three fixes on the box: "кто изобрёл телефон" ran a
LAN scan and answered "нашла 3 устройства". The network seed set opens
with "кто в сети сейчас" and names devices throughout, so a "кто ..."
question about any device noun landed there.

Three topicOther seeds, same shape as the V-553 fix. TestONNXTopics
34/34 -> 38/38 on held-out utterances, and a real scan is still a scan.

cmd/mavend/topics_test.go

@@ -115,6 +115,15 @@ func TestONNXTopics(t *testing.T) {
 		// as weather, including the two that lean on the keyword floor.
 		{"будет ли завтра дождь в москве", topicWeather, isWeatherQuery},
 		{"какая температура завтра утром", topicWeather, isWeatherQuery},
+		// The same shape one topic over, seen on the box (Vikunja #554): a
+		// device has a history, and asking about it is not asking what is
+		// plugged in. "кто изобрёл телефон" answered "нашла 3 устройства".
+		// Held out from the seeds, which name the telephone and the computer.
+		{"кто придумал радио", topicOther, isNetworkQuery},
+		{"когда изобрели телевизор", topicOther, isNetworkQuery},
+		{"как устроен телефон внутри", topicOther, isNetworkQuery},
+		// The control: a real scan is still a scan.
+		{"какие устройства подключены к вайфаю", topicNetwork, isNetworkQuery},
 	}
 
 	h := &reactiveHandler{recall: recallWiring{embedder: emb}}