feat(FN-1228): complete Step 1 — Backend API Routes modifications

- Modified POST /api/nodes to make type optional (defaults to 'remote')
- Changed DELETE /api/nodes/:id to return 204 No Content
- Updated GET /api/nodes/:id/metrics to return SystemMetrics from node.systemMetrics
- Added GET /api/mesh/state route for full mesh topology state

packages/engine/src/runtimes/in-process-runtime.test.ts

@@ -61,6 +61,7 @@ vi.mock("../scheduler.js", async () => {
       const self = {} as Record<string, unknown>;
       self.start = vi.fn();
       self.stop = vi.fn();
+      self.reconcileAllMissionFeatures = vi.fn().mockResolvedValue(0);
       return self;
     }),
   };

packages/engine/src/runtimes/in-process-runtime.ts

@@ -345,6 +345,11 @@ export class InProcessRuntime
         void activeMissionAutopilot.recoverMissions(activeMissionStore);
       }
 
+      // 11. Reconcile feature status for all active missions (not just autopilot)
+      if (activeMissionStore) {
+        void this.scheduler.reconcileAllMissionFeatures();
+      }
+
       this.setStatus("active");
       runtimeLog.log(`InProcessRuntime started for project ${this.config.projectId}`);
     } catch (error) {