[SYS] Publish the reboot reason with retain flag (#1802)

So as to have the information stored on the MQTT broker
Also remove stopProcessing, not necessary as we follow by a restart

main/User_config.h

@@ -697,6 +697,7 @@ Adafruit_NeoPixel leds2(ANEOPIX_IND_NUM_LEDS, ANEOPIX_IND_DATA_GPIO2, ANEOPIX_IN
 #define TimeLedON                    1 // time LED are ON
 #define InitialMQTTConnectionTimeout 10 // time estimated (s) before the board is connected to MQTT
 #define subjectSYStoMQTT             "/SYStoMQTT" // system parameters
+#define subjectLOGtoMQTT             "/LOGtoMQTT" // log informations
 #define subjectRLStoMQTT             "/RLStoMQTT" // latest release information
 #define subjectMQTTtoSYSset          "/commands/MQTTtoSYS/config"
 #define subjectMQTTtoSYSupdate       "/commands/MQTTtoSYS/firmware_update"

main/ZgatewayBT.ino

@@ -115,7 +115,6 @@ void btScanWDG() {
       scanCount != 0 &&
       (now - lastBtScan > ((BTConfig.BLEinterval + BTConfig.scanDuration) < GeneralTimeOut ? GeneralTimeOut + 1000 : (BTConfig.BLEinterval + BTConfig.scanDuration)))) {
     Log.error(F("BLE Scan watchdog triggered at : %ds" CR), lastBtScan / 1000);
-    stopProcessing();
     ESPRestart(4);
   } else {
     previousBtScanCount = scanCount;

main/main.ino

@@ -63,8 +63,8 @@ unsigned long timer_sys_checks = 0;
 
 #  include <queue>
 int queueLength = 0;
-int queueLengthSum = 0;
-int blockedMessages = 0;
+unsigned long queueLengthSum = 0;
+unsigned long blockedMessages = 0;
 int maxQueueLength = 0;
 #  ifndef QueueSize
 #    define QueueSize 18
@@ -1478,14 +1478,25 @@ bool wifi_reconnect_bypass() {
   6 - OTA Update
   7 - Parameters changed
 */
+#if defined(ESP8266) || defined(ESP32)
 void ESPRestart(byte reason) {
+  delay(1000);
+  StaticJsonDocument<128> jsonBuffer;
+  JsonObject jsondata = jsonBuffer.to<JsonObject>();
+  jsondata["reason"] = reason;
+  jsondata["retain"] = true;
+  jsondata["uptime"] = uptime();
+  pub(subjectLOGtoMQTT, jsondata);
   Log.warning(F("Rebooting for reason code %d" CR), reason);
-#if defined(ESP32)
+#  if defined(ESP32)
   ESP.restart();
-#elif defined(ESP8266)
+#  elif defined(ESP8266)
   ESP.reset();
-#endif
+#  endif
 }
+#else
+void ESPRestart(byte reason) {}
+#endif
 
 #if defined(ESPWifiManualSetup)
 void setup_wifi() {