Merge upstream companion-v1.17.0 (CAD) into power-saving

Adopts hardware Channel Activity Detection (wired into
RadioLibWrapper::isChannelActive() alongside our RSSI-threshold check
and RX duty-cycle power-save), MCU temperature telemetry, LR2021
standby workaround, DISPLAY_SCALE/FLIP overrides, NRF52Board
shutdownPeripherals() refactor, and misc upstream fixes.

Declines upstream's ConfigSerializer-based NodePrefs rewrite,
MultiSerialInterface/interface_manager, and UIColor palette system —
each would have broken large parts of the Solo-specific feature set
(NodePrefs fields, per-variant single serial_interface, enum-based
DisplayDriver::Color). Flagged as candidate follow-up migrations, not
permanent no's.

Also fixes several pre-existing bugs surfaced while chasing silent
merge breaks (stale newMsg() override signature in ui-tiny/ui-orig,
dead UIEventType::newContactMessage case, missing ContactsIterator
init), bumps FIRMWARE_VERSION/MESHCORE_VERSION to 1.17, and fixes a
missing <cstdlib> include that broke the native ConfigSerializer unit
tests.

Verified via 13+ pio run builds across ESP32/nRF52, all 3 companion UI
variants, and 7 display drivers, plus the full native unit test suite
(33/33 passing).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/helpers/radiolib/RadioLibWrappers.h

@@ -3,12 +3,21 @@
 #include <Mesh.h>
 #include <RadioLib.h>
 
+#ifdef USE_CC310_HW_CRYPTO
+#include <Adafruit_nRFCrypto.h>
+#endif
+struct PacketMillis {
+  uint32_t preambleMillis;  // preamble-detect -> header-valid deadline
+  uint32_t payloadMillis;   // header-valid   -> rx-done deadline
+};
+
 class RadioLibWrapper : public mesh::Radio {
 protected:
   PhysicalLayer* _radio;
   mesh::MainBoard* _board;
   uint32_t n_recv, n_sent, n_recv_errors;
   int16_t _noise_floor, _threshold;
+  bool _cad_enabled;
   uint16_t _num_floor_samples;
   int32_t _floor_sample_sum;
   uint8_t _preamble_sf;
@@ -118,9 +127,12 @@ public:
     return -7.5f - 2.5f * (float)(sf - 7);
   }
   void updatePreamble(uint8_t sf) { _preamble_sf = sf; _radio->setPreambleLength(preambleLengthForSF(sf)); }
+  PacketMillis calcMaxPacketMillis(uint8_t sf, float bw, uint8_t cr, uint8_t preambleSymbols);
+  virtual int16_t performChannelScan();
 
   int getNoiseFloor() const override { return _noise_floor; }
   void triggerNoiseFloorCalibrate(int threshold) override;
+  void setCADEnabled(bool enable) override { _cad_enabled = enable; }
   void resetAGC() override;
 
   void loop() override;
@@ -137,8 +149,10 @@ public:
 
   float packetScore(float snr, int packet_len) override { return packetScoreInt(snr, 10, packet_len); }  // assume sf=10
 
-  virtual void setRxBoostedGainMode(bool) { }
+  virtual bool setRxBoostedGainMode(bool) { return false; }
   virtual bool getRxBoostedGainMode() const { return false; }
+  
+  virtual bool configSideDetectors(const uint8_t sideDetSFs[], uint8_t num, float bw) { return false; }
 };
 
 /**
@@ -151,8 +165,15 @@ public:
   RadioNoiseListener(PhysicalLayer& radio): _radio(&radio) { }
 
   void random(uint8_t* dest, size_t sz) override {
+#ifdef USE_CC310_HW_CRYPTO
+    // CC310 TRNG is higher quality and environment-independent vs radio RSSI noise.
+    nRFCrypto.begin();
+    nRFCrypto.Random.generate(dest, (uint16_t)sz);
+    nRFCrypto.end();
+#else
     for (int i = 0; i < sz; i++) {
       dest[i] = _radio->randomByte() ^ (::random(0, 256) & 0xFF);
     }
+#endif
   }
 };