fix: release beds/lockers in batchCheckOut

The batchCheckOut method was not releasing assigned beds and lockers
after checkout, leaving them orphaned as 'occupied'. Added the same
release pattern used in checkOut() — using runner.manager.update()
since batchCheckOut operates inside a QueryRunner transaction.

apps/server/src/occupancies/occupancies.service.ts

@@ -343,6 +343,9 @@ export class OccupanciesService {
         if (remaining === 0) {
           await runner.manager.update(Room, occ.roomId, { gender: null as any });
         }
+        // 释放床位/柜子
+        if (occ.bedId) await runner.manager.update(Bed, occ.bedId, { status: 'available' });
+        if (occ.lockerId) await runner.manager.update(Locker, occ.lockerId, { status: 'available' });
         success++;
       }
       await runner.commitTransaction();