message: config/consensus: use a constant for `max_execution_delay`
diff: @@ -15,6 +15,8 @@ use crate::{
  utils::{External, LoadError, Loadable},
  };
  +const DEFAULT_MAX_EXECUTION_DELAY: u64 = 3;
  +
  /// Consensus configuration.
  #[derive(DataSize, Debug, Deserialize, Clone)]
  // Disallow unknown fields to ensure config files and command-line overrides contain valid keys.
  @@ -37,7 +39,7 @@ impl Default for Config {
  fn default() -> Self {
  Config {
  secret_key_path: External::Missing,
  - max_execution_delay: 3,
  + max_execution_delay: DEFAULT_MAX_EXECUTION_DELAY,
  highway: HighwayConfig::default(),
  zug: ZugConfig::default(),
  }
  