CommandMgr: wifi/sleep/periods/ota handlers; integrate OTAMgr check at boot; WiFi home flag flow

CAR_GPS_TRACKER.ino

@@ -43,6 +43,17 @@ void setup() {
 
   // GNSS power on (if applicable later)
   NetMgr::sendAT("AT+CGNSPWR=1", 2000);
+
+OTAMgr::setCurrentVersion(FW_VERSION);
+String ver, url, sha;
+if (OTAMgr::check(CFG.baseUrl, CFG.imei, ver, url, sha)) {
+  Serial.println("OTA available: " + ver + " -> " + url);
+  // Optionally apply now:
+  // OTAMgr::apply(url, sha);
+}
+
+
+
 }
 
 void loop() {