feat(FN-972): auto-triage features when slice activated with autoAdvance

- When a slice is activated and has autoAdvance enabled, automatically triage all features in that slice
- Add auto-triage logic to mission-store activateSlice method
- Add comprehensive tests for auto-triage behavior covering edge cases
- Fix module import paths across mission-related files (mission.ts, extension.ts, mission-integration.test.ts, mission-routes.ts, scheduler.ts)

packages/engine/src/scheduler.ts

@@ -743,7 +743,7 @@ export class Scheduler {
           continue;
         }
 
-        const activated = missionStore.activateSlice(pendingSlice.id);
+        const activated = await missionStore.activateSlice(pendingSlice.id);
         schedulerLog.log(`Activated slice ${activated.id} for mission ${missionId}`);
         return activated;
       }