message: [consensus] reduce default max pruned block size
  Closes:
diff: @@ -27,7 +27,7 @@ impl Default for ConsensusConfig {
  ConsensusConfig {
  contiguous_rounds: 2,
  max_block_size: 1000,
  - max_pruned_blocks_in_mem: 10000,
  + max_pruned_blocks_in_mem: 100,
  round_initial_timeout_ms: 1000,
  proposer_type: ConsensusProposerType::LeaderReputation(LeaderReputationConfig {
  active_weights: 99,
  