Add boolean to only warn a user of a duplicated key once per boot

src/mesh/NodeDB.cpp

@@ -1566,7 +1566,8 @@ bool NodeDB::updateUser(uint32_t nodeId, meshtastic_User &p, uint8_t channelInde
         printBytes("Incoming Pubkey: ", p.public_key.bytes, 32);
 
         // Alert the user if a remote node is advertising public key that matches our own
-        if (owner.public_key.size == 32 && memcmp(p.public_key.bytes, owner.public_key.bytes, 32) == 0) {
+        if (owner.public_key.size == 32 && memcmp(p.public_key.bytes, owner.public_key.bytes, 32) == 0 && !duplicateWarned) {
+            duplicateWarned = true;
             char warning[] = "Remote device %s has advertised your public key. This may indicate a low-entropy key. You may need "
                              "to regenerate your public keys.";
             LOG_WARN(warning, p.long_name);

src/mesh/NodeDB.h

@@ -258,6 +258,7 @@ class NodeDB
                             int restoreWhat = SEGMENT_CONFIG | SEGMENT_MODULECONFIG | SEGMENT_DEVICESTATE | SEGMENT_CHANNELS);
 
   private:
+    bool duplicateWarned = false;
     uint32_t lastNodeDbSave = 0;    // when we last saved our db to flash
     uint32_t lastBackupAttempt = 0; // when we last tried a backup automatically or manually
     /// Find a node in our DB, create an empty NodeInfoLite if missing