fix: TBeam 1W ramp fixes

src/helpers/radiolib/CustomSX1262Wrapper.h

@@ -23,7 +23,16 @@ public:
     ((CustomSX1262 *)_radio)->setMaxPayloadMillis(pm.payloadMillis);
   }
 
-  bool isReceivingPacket() override { 
+#ifdef SX126X_PA_RAMP_TIME
+  void setTxPower(int8_t dbm) override {
+    RadioLibWrapper::setTxPower(dbm);
+    // SX126x::setOutputPower() hardcodes a 200us PA ramp; boards with an
+    // external PA need a longer ramp, so re-apply it after every power change.
+    ((CustomSX1262 *)_radio)->setPaRampTime(SX126X_PA_RAMP_TIME);
+  }
+#endif
+
+  bool isReceivingPacket() override {
     return ((CustomSX1262 *)_radio)->isReceiving();
   }
   float getCurrentRSSI() override {

src/helpers/radiolib/RadioLibWrappers.h

@@ -49,7 +49,7 @@ public:
 
   virtual void setParams(float freq, float bw, uint8_t sf, uint8_t cr) = 0;
   uint32_t getRngSeed();
-  void setTxPower(int8_t dbm);
+  virtual void setTxPower(int8_t dbm);
 
   virtual float getCurrentRSSI() =0;
   virtual uint8_t getSpreadingFactor() const { return LORA_SF; }