feat: set labels in NodeContext/Info

src/NodeContext.cpp

@@ -4,6 +4,16 @@ NodeContext::NodeContext() {
     udp = new WiFiUDP();
     memberList = new std::map<String, NodeInfo>();
     hostname = "";
+    self.hostname = "";
+    self.ip = IPAddress();
+    self.lastSeen = 0;
+    self.status = NodeInfo::INACTIVE;
+}
+
+NodeContext::NodeContext(std::initializer_list<std::pair<String, String>> initialLabels) : NodeContext() {
+    for (const auto& kv : initialLabels) {
+        self.labels[kv.first] = kv.second;
+    }
 }
 
 NodeContext::~NodeContext() {