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/main.cpp

@@ -9,6 +9,7 @@
 #include "PowerMon.h"
 #include "RadioLibInterface.h"
 #include "ReliableRouter.h"
+#include "TransmitHistory.h"
 #include "airtime.h"
 #include "buzz.h"
 #include "power/PowerHAL.h"
@@ -703,6 +704,9 @@ void setup()
     // We do this as early as possible because this loads preferences from flash
     // but we need to do this after main cpu init (esp32setup), because we need the random seed set
     nodeDB = new NodeDB;
+
+    // Initialize transmit history to persist broadcast throttle timers across reboots
+    TransmitHistory::getInstance()->loadFromDisk();
 #if HAS_TFT
     if (config.display.displaymode == meshtastic_Config_DisplayConfig_DisplayMode_COLOR) {
         tftSetup();