- child-process-worker.test.ts: replace Function[] with SignalListener type
- remote-node-runtime.test.ts: add yield statement to idleStream generator
- All 57 test files pass with 0 errors
- Add RemoteNodeClient and RemoteNodeRuntime with comprehensive lifecycle, status, and metrics test coverage
- Route projects by node assignment in ProjectManager and integrate remote runtime handling in HybridExecutor
- Introduce NodeHealthMonitor and wire diagnostic logging/export updates for remote node health tracking
- Harden remote runtime shutdown checks and type-safety paths surfaced during review feedback
