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.go

@@ -212,6 +212,15 @@ var topicSeedSets = map[topicLabel][]string{
 		// noun it has never seen.
 		"какой сегодня курс валют",
 		"что сегодня происходит в мире",
+		// The same story one topic over, found while verifying V-554 on the
+		// box: "кто изобрёл телефон" ran a LAN scan and answered "нашла 3
+		// устройства". The network set opens with "кто в сети сейчас" and
+		// names devices throughout, so a "кто ..." question about any device
+		// noun landed there. A device has a history, and asking about it is
+		// not asking what is plugged in.
+		"кто изобрёл телефон",
+		"когда появился первый компьютер",
+		"как работает роутер",
 	},
 }