message: Do not log every time a backup receives a signature
diff: @@ -661,7 +661,7 @@ namespace raft
  break;
  case kv::DeserialiseSuccess::PASS_SIGNATURE:
  - LOG_INFO_FMT("Deserialising signature at {}", i);
  + LOG_DEBUG_FMT("Deserialising signature at {}", i);
  committable_indices.push_back(i);
  if (sig_term)
  term_history.update(commit_idx + 1, sig_term);
  