Mark meshPackets based on which interface received. (#7589)

src/mesh/api/PacketAPI.cpp

@@ -59,6 +59,7 @@ bool PacketAPI::receivePacket(void)
         switch (mr->which_payload_variant) {
         case meshtastic_ToRadio_packet_tag: {
             meshtastic_MeshPacket *mp = &mr->packet;
+            mp->transport_mechanism = meshtastic_MeshPacket_TransportMechanism_TRANSPORT_API;
             printPacket("PACKET FROM QUEUE", mp);
             service->handleToRadio(*mp);
             break;