Logging: Include transaction hash in transaction pool diff logs

[garethtdavies]

With the daemon flag of --log-txn-pool-gossip true it is possible to see the gossiped transaction information. A sample one is below:

{"timestamp":"2021-11-22 19:13:49.317325Z","level":"Debug","source":{"module":"Mina_networking","location":"File \"src/lib/mina_networking/mina_networking.ml\", line 1418, characters 14-30"},"message":"Received transaction-pool diff $txns from $sender","metadata":{"host":"198.166.228.6","peer_id":"12D3KooWRFdjiRud4h6MbskXdQrsh27xadtSMr3PzDieLy1wHRqH","pid":16,"port":8302,"sender":{"Remote":{"host":"xx.xx.xx.xx","peer_id":"xxxxx","libp2p_port":8302}},"txns":[["Signed_command",{"payload":{"common":{"fee":"0.01","fee_token":"1","fee_payer_pk":"B62qqa9g4CFfkSuX2j22S52z6UfcDcS9tMTgQrFKZ21v7GrEP6Zu5Tc","nonce":"1633","valid_until":"4294967295","memo":"E4Yd7qwaRCHR6t7i6ToM98eSUy5eKKadQUPZX7Vpw4CWBvWyd8fzK"},"body":["Payment",{"source_pk":"B62qqa9g4CFfkSuX2j22S52z6UfcDcS9tMTgQrFKZ21v7GrEP6Zu5Tc","receiver_pk":"B62qjbRiPP47zXuG1rdedoknZCTtiRDzsB2k7W1sQ5N1jQ5AJJA1Fog","token_id":"1","amount":"589564000"}]},"signer":"B62qqa9g4CFfkSuX2j22S52z6UfcDcS9tMTgQrFKZ21v7GrEP6Zu5Tc","signature":"7mX1fBu5WokrPQi8j7B4uvxUtm4TMAcdteH4giVCWVv3PagHYv94xCqLzyzXbJYCmCuNqj7H1xAuCzpmavJFzi8qtUASXuEA"}]]},"event_id":"83ce0117c702f9427f51e8dcfa89ee58"}

This doesn't include the tx hash or payment id. Is it possible to include these such that it is possible to create some better tooling for visualizing the transaction pool?