Add timed cw and cw2 commands for SX1262 and LR1110

Support fractional seconds, guard active packet work, keep the MCU awake, and restore reception after carrier tests. Include regression coverage and independent-radio RF validation for the V4 and T1000-E.

src/Dispatcher.cpp

@@ -309,6 +309,9 @@ void Dispatcher::loop() {
     next_floor_calib_time = futureMillis(NOISE_FLOOR_CALIB_INTERVAL);
   }
   _radio->loop();
+  // A maintenance carrier has no TxDone packet. Keep its deadline serviced,
+  // but leave queued packets and RX/AGC watchdogs alone until normal RX returns.
+  if (_radio->isCarrierWaveActive()) return;
 
   const unsigned long now = _ms->getMillis();
   // check for radio 'stuck' in mode other than Rx
@@ -590,6 +593,7 @@ bool Dispatcher::tryParsePacket(Packet* pkt, const uint8_t* raw, int len) {
 }
 
 void Dispatcher::checkRecv() {
+  if (_radio->isCarrierWaveActive()) return;
   Packet* pkt;
   float score;
   float snr;
@@ -697,6 +701,7 @@ void Dispatcher::processRecvPacket(Packet* pkt) {
 }
 
 void Dispatcher::checkSend() {
+  if (_radio->isCarrierWaveActive()) return;
   const uint32_t now = _ms->getMillis();
   uint32_t next_outbound;
   if (_mgr->getNextOutboundTime(now, next_outbound)) {