Cardano Updates

Implements Cardano-style P2P peer selection to make front-running more
difficult through dynamic topology changes. Peers cycle through cold,
warm, and hot states with periodic churn events.

Key changes:
- Add PeerManager class to track peer states per node
- Add PeerChurn simulation event for periodic state transitions
- Modify tx propagation to only use hot upstream peers in P2P mode
- Add CLI flags: --p2p, --p2p-hot-peers, --p2p-churn-interval,
  --p2p-demotion-prob

The feature is toggleable (off by default) to preserve existing
static topology behavior.

Replace cold/warm/hot state machine with a simpler active set model:
- Each node maintains a subset of active peers from topology
- Churn probabilistically replaces active peers with inactive ones
- Removes PeerState type and PeerInfo interface
- Renames CLI options: --p2p-hot-peers → --p2p-active-peers,
  --p2p-demotion-prob → --p2p-churn-prob

This mirrors Cardano's peer selection governor behavior with partial,
probabilistic churn rather than wholesale peer set replacement.

Also convert config to yaml for it allows comments

- Remove redundant console.log in cli.ts (already logged via logger.fatal)
- Remove duplicate Canvas useEffect that called draw() on every change
- Use hoveredNodeRef instead of state in draw() to avoid recreation on mouse move
- Throttle force layout position updates with requestAnimationFrame
- Only update event log state when lengths actually change
- Only update animatedTxs state when count changes

These changes prevent the force layout from triggering 100+ React
re-renders per second during initial settling.

Fixed local sortition for non-persistent voters in benchmark

Implements Cardano-style P2P peer selection to make front-running more
difficult through dynamic topology changes. Peers cycle through cold,
warm, and hot states with periodic churn events.

Key changes:
- Add PeerManager class to track peer states per node
- Add PeerChurn simulation event for periodic state transitions
- Modify tx propagation to only use hot upstream peers in P2P mode
- Add CLI flags: --p2p, --p2p-hot-peers, --p2p-churn-interval,
  --p2p-demotion-prob

The feature is toggleable (off by default) to preserve existing
static topology behavior.

The visualized topology is still hard-coded, but the travel times are
accurate. Something was wrong with the IPs, where the connection ids
were at leasts inconsistent.

This also changes the default tmp dir to be not hidden