fix: prevent hangs when processing long sensor names

src/Sensors.h

@@ -409,7 +409,7 @@ public:
 
   static String& cleanName(String& value, char space = ' ') {
     // only valid symbols
-    for (uint8_t pos = 0; pos < value.length(); pos++) {
+    for (size_t pos = 0; pos < value.length(); pos++) {
       char symbol = value.charAt(pos);
 
       // 0..9

src/utils.h

@@ -1885,7 +1885,7 @@ bool jsonToSensorSettings(const uint8_t sensorId, const JsonVariantConst src, Se
   }
 
   // name
-  if (!src[FPSTR(S_NAME)].isNull()) {
+  if (src[FPSTR(S_NAME)].is<JsonString>() && src[FPSTR(S_NAME)].as<JsonString>().size() < sizeof(dst.name)) {
     auto value = src[FPSTR(S_NAME)].as<String>();
     Sensors::cleanName(value);