Add `hopStart` (original hopLimit of a packet) to MeshPacket

meshtastic/mesh.options

@@ -26,6 +26,7 @@
 *MeshPacket.encrypted max_size:256
 *MeshPacket.payload_variant anonymous_oneof:true
 *MeshPacket.hop_limit int_size:8
+*MeshPacket.hop_start int_size:8
 *MeshPacket.channel int_size:8
 
 *QueueStatus.res int_size:8

meshtastic/mesh.proto

@@ -1003,6 +1003,12 @@ message MeshPacket {
    * Describes whether this packet passed via MQTT somewhere along the path it currently took.
    */
   bool via_mqtt = 14;
+
+  /* 
+   * Hop limit with which the original packet started. Sent via LoRa using three bits in the unencrypted header. 
+   * When receiving a packet, the difference between hop_start and hop_limit gives how many hops it traveled.
+   */ 
+  uint32 hop_start = 15;
 }
 
 /*
@@ -1539,5 +1545,4 @@ message DeviceMetadata {
    * Has Remote Hardware enabled
    */
   bool hasRemoteHardware = 10;
-}
-
+}