feat(FN-1079): add remote node runtime orchestration

- 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

packages/engine/src/logger.ts

@@ -82,3 +82,9 @@ export const autopilotLog = createLogger("autopilot");
 
 /** Logger for the heartbeat execution subsystem. */
 export const heartbeatLog = createLogger("heartbeat");
+
+/** Logger for remote node runtime/client subsystems. */
+export const remoteNodeLog = createLogger("remote-node");
+
+/** Logger for periodic node health monitor subsystem. */
+export const nodeHealthMonitorLog = createLogger("node-health-monitor");