Four new docs at docs/v2/ giving a single-page tour of each v2 piece:
- Architecture-v2.md: top-level mental model (fused Host + roles + cluster + live-edit)
- Cluster.md: AkkaClusterOptions + IClusterRoleInfo + WithOtOpcUaClusterBootstrap
- ControlPlane.md: 5 admin singletons + DPS topics + deploy flow + failover recovery
- Runtime.md: per-node actor tree + state machines + engine-wiring follow-up map
Each links back to the design doc for depth. Architecture-v2 cross-references
the other three + ServiceHosting + Redundancy + security.