- Add NodeConfig/NodeStatus types, export node types from @fusion/core, and include optional nodeId on registered projects
- Upgrade central DB schema to v2 with a nodes table, node indexes, and projects.nodeId migration handling
- Implement CentralCore node APIs for register/update/list/get/unregister, health checks, and project-to-node assignment flows with emitted events
- Seed a default local node during central init and mark it online using global concurrency settings
- Expand central-core and central-db tests to cover node defaults, schema changes, lifecycle operations, health transitions, and assignment behavior