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/cli/src/commands/mission.ts

@@ -262,7 +262,7 @@ export async function runMissionActivateSlice(id: string, projectName?: string)
     process.exit(1);
   }
 
-  const activated = missionStore.activateSlice(id);
+  const activated = await missionStore.activateSlice(id);
   console.log();
   console.log(`  ✓ Activated ${activated.id}: "${activated.title}"`);
   console.log(`    Status: ${SLICE_STATUS_LABELS[activated.status]}`);