chore: log the power setting with the Yaesu meters, to identify the wattmeter

One transmission cannot name it. RM4 rose while RM5 stayed flat — which points at
RM4 — but RM5 differed BETWEEN transmissions, 208 then 105, which points at RM5.
Both readings are consistent with either answer, so picking one now would just be
the FT-991A table mistake again in a new place.

The survey line now carries the rig's power setting, and the sample cap is raised
from 12 to 40 so two transmissions fit. Keying at, say, 10 W and then 100 W makes
the answer a one-line comparison: the wattmeter is whichever index moves with the
setting.

The displayed mapping is left alone until that comparison exists.

internal/cat/yaesu_panel.go

@@ -135,7 +135,7 @@ func (y *Yaesu) readPanel(mode string, split bool, txHz int64) {
 		// the transmission starts catches the meters still at rest (RM4=13, the
 		// rest zero), which says nothing. What identifies a meter is which index
 		// TRACKS the power over a few seconds of steady carrier.
-		if y.metersLogged < 12 {
+		if y.metersLogged < 40 {
 			y.metersLogged++
 			raw := make([]string, 0, 6)
 			for i := 1; i <= 6; i++ {
@@ -146,7 +146,14 @@ func (y *Yaesu) readPanel(mode string, split bool, txHz int64) {
 					raw = append(raw, fmt.Sprintf("RM%d=-", i))
 				}
 			}
-			debugLog.Printf("yaesu: meters while transmitting: %s (send this if a bar reads wrong)", strings.Join(raw, " "))
+			// The POWER SETTING goes on the same line. Which index is the wattmeter
+			// cannot be read off one transmission — RM4 rose while RM5 sat still,
+			// but RM5 differed BETWEEN transmissions (208 then 105), so both are
+			// candidates. What settles it is transmitting at two different power
+			// settings and seeing which index follows: printing the setting here
+			// makes that a one-line comparison instead of a memory exercise.
+			debugLog.Printf("yaesu: meters at PC=%dW: %s (compare two different power settings)",
+				y.panel.RFPower, strings.Join(raw, " "))
 		}
 		// Measured on an FTDX10 (2026-07-29), a steady carrier for three seconds:
 		//