fix(tci): resubscribe to the meters at 'ready', and log what comes back

The report from a real SunSDR: transmit power and SWR still empty after the
sensors fix. The subscription went out once, at connect — while ExpertSDR3 is
still streaming its initial state dump, exactly where a unidirectional control
command can be ignored. It is now renewed every time the server says 'ready'.

The sensor messages also join the logged-on-arrival set, capped like the rest:
the next log will say whether TX_SENSORS ever arrives, which is the question —
a radio that never sends it (AetherSDR may not) and a frame that arrived and
was dropped leave the same blank meters and need opposite fixes.

internal/cat/tci_panel.go

@@ -113,7 +113,8 @@ func (t *TCI) handlePanel(name string, get func(int) string, args string) bool {
 	// it. What the radio actually announces after the command settles whether
 	// this is our reading or its doing, and no amount of reasoning will.
 	switch name {
-	case "mute", "sql_enable", "sql_level", "tx_power", "tx_swr", "tune":
+	case "mute", "sql_enable", "sql_level", "tx_power", "tx_swr", "tune",
+		"tx_sensors", "rx_sensors", "rx_channel_sensors":
 		// Logged on arrival so an ANSWER can be told from a SILENCE: the log
 		// showed the transmit meters being asked for and nothing coming back,
 		// which on its own proves nothing — a reply that arrived and failed to