Module bootstrap 

Cluster bootstrap and join protocol.

Three startup paths:

1. Bootstrap: First seed node — creates topology, routing table, Raft groups, persists to catalog. The cluster is born.

2. Join: New node contacts a seed, receives full cluster state via JoinResponse, persists, and registers peers.

3. Restart: Node loads topology + routing from catalog, reconnects to known peers.

Structs

ClusterConfig

Configuration for cluster formation.

ClusterState

Result of cluster startup — everything needed to run the Raft loop.

Functions

handle_join_request

Build a JoinResponse from current cluster state.

start_cluster

Start the cluster — bootstrap, join, or restart depending on state.