Show calibration wait timer in debug output

Auto_Seat.ino

@@ -622,6 +622,7 @@ void printStatus(const __FlashStringHelper *tag) {
   Serial.print(forceCalibration ? 1 : 0);
   Serial.print(F(" autoCalState="));
   Serial.println(autoCalibrationState);
+  printAutoCalibrationDelayStatus();
 }
 
 void printUptime() {
@@ -644,6 +645,48 @@ void printUptime() {
   Serial.println(F("ms"));
 }
 
+void printAutoCalibrationDelayStatus() {
+  if (useCount < USES_BEFORE_AUTO_CALIBRATION) {
+    return;
+  }
+
+  Serial.print(F("autoCalOffTimer="));
+  if (ignitionState == HIGH) {
+    Serial.println(F("waiting_for_ig_off"));
+    return;
+  }
+
+  unsigned long elapsedMs = millis() - ignitionOffStartTime;
+  unsigned long remainingMs = 0;
+  if (elapsedMs < AUTO_CALIBRATION_DELAY_MS) {
+    remainingMs = AUTO_CALIBRATION_DELAY_MS - elapsedMs;
+  }
+
+  Serial.print(F("elapsed "));
+  printDuration(elapsedMs);
+  Serial.print(F(" remaining "));
+  printDuration(remainingMs);
+  Serial.println();
+}
+
+void printDuration(unsigned long totalMs) {
+  unsigned long hours = totalMs / 3600000UL;
+  totalMs %= 3600000UL;
+  unsigned long minutes = totalMs / 60000UL;
+  totalMs %= 60000UL;
+  unsigned long seconds = totalMs / 1000UL;
+  unsigned long milliseconds = totalMs % 1000UL;
+
+  Serial.print(hours);
+  Serial.print(F("h "));
+  Serial.print(minutes);
+  Serial.print(F("m "));
+  Serial.print(seconds);
+  Serial.print(F("s "));
+  Serial.print(milliseconds);
+  Serial.print(F("ms"));
+}
+
 void setRelay(int relayPin, boolean state) {
   digitalWrite(relayPin, state ? LOW : HIGH);
 }