message: Log chainspec and key block hashes when starting era.
diff: @@ -429,11 +429,9 @@ impl EraSupervisor {
  .flat_map(|era_end| era_end.era_report().equivocators.clone())
  .collect();
  - let instance_id = instance_id(
  - self.chainspec.hash(),
  - era_id,
  - key_block.hash(self.verifiable_chunked_hash_activation()),
  - );
  + let chainspec_hash = self.chainspec.hash();
  + let key_block_hash = key_block.hash(self.verifiable_chunked_hash_activation());
  + let instance_id = instance_id(chainspec_hash, era_id, key_block_hash);
  let now = Timestamp::now();
  info!(
  @@ -441,6 +439,8 @@ impl EraSupervisor {
  %start_time,
  %now,
  %start_height,
  + %chainspec_hash,
  + %key_block_hash,
  %instance_id,
  %seed,
  era = era_id.value(),
  