Add nodedb channel handling (#2384)

* send ourNodeInfo to channel we got a message we heared someone new

* store node-channel into nodeDB

* use channel from nodeDb to send local messages

* update protobufs

* fmt and fix braces

* respect requested channel for local send, only store channel while getting a nodeinfo packet

---------

Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mesh/Router.cpp

@@ -173,6 +173,10 @@ ErrorCode Router::sendLocal(meshtastic_MeshPacket *p, RxSource src)
             handleReceived(p, src);
         }
 
+        if (p->channel) // don't override if a channel was requested
+            p->channel = nodeDB.getNodeChannel(p->to);
+        LOG_DEBUG("localSend to channel %d\n", p->channel);
+
         return send(p);
     }
 }