Add the key used to PKI decrypt to MeshPacket

meshtastic/mesh.proto

@@ -1127,6 +1127,16 @@ message MeshPacket {
    * When receiving a packet, the difference between hop_start and hop_limit gives how many hops it traveled.
    */
   uint32 hop_start = 15;
+
+  /*
+   * Records the public key the packet was encrypted with, if applicable.
+   */
+  bytes public_key = 16;
+
+  /*
+   * Indicates whether the packet was en/decrypted using PKI
+   */
+  bool pki_encrypted = 17;
 }
 
 /*