Add Transmit history persistence for respecting traffic intervals between reboots (#9748)

* Add transmit history for throttling that persists between reboots

* Fix RAK long press detection to prevent phantom shutdowns from floating pins

* Update test/test_transmit_history/test_main.cpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Test fixes and placeholder for content handler tests

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/modules/Telemetry/PowerTelemetry.cpp

@@ -10,6 +10,7 @@
 #include "PowerTelemetry.h"
 #include "RTC.h"
 #include "Router.h"
+#include "TransmitHistory.h"
 #include "graphics/SharedUIDisplay.h"
 #include "main.h"
 #include "power.h"
@@ -22,6 +23,8 @@
 #include "graphics/ScreenFonts.h"
 #include <Throttle.h>
 
+static constexpr uint16_t TX_HISTORY_KEY_POWER_TELEMETRY = 0x8005;
+
 namespace graphics
 {
 extern void drawCommonHeader(OLEDDisplay *display, int16_t x, int16_t y, const char *titleStr, bool force_no_invert,
@@ -88,10 +91,12 @@ int32_t PowerTelemetryModule::runOnce()
         if (!moduleConfig.telemetry.power_measurement_enabled)
             return disable();
 
-        if (((lastSentToMesh == 0) || !Throttle::isWithinTimespanMs(lastSentToMesh, sendToMeshIntervalMs)) &&
+        uint32_t lastTelemetry = transmitHistory ? transmitHistory->getLastSentToMeshMillis(TX_HISTORY_KEY_POWER_TELEMETRY) : 0;
+        if (((lastTelemetry == 0) || !Throttle::isWithinTimespanMs(lastTelemetry, sendToMeshIntervalMs)) &&
             airTime->isTxAllowedAirUtil()) {
             sendTelemetry();
-            lastSentToMesh = millis();
+            if (transmitHistory)
+                transmitHistory->setLastSentToMesh(TX_HISTORY_KEY_POWER_TELEMETRY);
         } else if (((lastSentToPhone == 0) || !Throttle::isWithinTimespanMs(lastSentToPhone, sendToPhoneIntervalMs)) &&
                    (service->isToPhoneQueueEmpty())) {
             // Just send to phone when it's not our time to send to mesh yet