fix(lastleg): inspect occupied pallets for PDA queries

lastleg-service/src/main/java/com/baiyue/lastleg/inboundplan/pda/gateway/HttpWarehouseResourceGateway.java

@@ -117,6 +117,17 @@ public class HttpWarehouseResourceGateway implements WarehouseResourceGateway {
 
     @Override
     public WarehousePalletReference resolvePallet(String palletCode) {
+        WarehousePalletData data = palletData(palletCode);
+        requireReservable(data);
+        return pallet(data);
+    }
+
+    @Override
+    public WarehousePalletReference inspectPallet(String palletCode) {
+        return pallet(palletData(palletCode));
+    }
+
+    private WarehousePalletData palletData(String palletCode) {
         WarehousePalletResponse response = client.get()
             .uri("/internal/v1/warehouse-pallets/resolve/{palletCode}", palletCode)
             .header("X-Internal-Service-Token", internalToken)
@@ -130,10 +141,12 @@ public class HttpWarehouseResourceGateway implements WarehouseResourceGateway {
             throw new ResponseStatusException(HttpStatus.SERVICE_UNAVAILABLE,
                 "Warehouse pallet service returned no usable response");
         }
-        requireReservable(response.data());
-        return new WarehousePalletReference(response.data().id(), response.data().palletCode(),
-            response.data().warehouseId(), response.data().locationId(), response.data().status(),
-            response.data().fbaWarehouseCode(), response.data().unitPrice(), response.data().version());
+        return response.data();
+    }
+
+    private WarehousePalletReference pallet(WarehousePalletData data) {
+        return new WarehousePalletReference(data.id(), data.palletCode(), data.warehouseId(), data.locationId(),
+            data.status(), data.fbaWarehouseCode(), data.unitPrice(), data.version());
     }
 
     @Override

lastleg-service/src/main/java/com/baiyue/lastleg/inboundplan/pda/gateway/WarehouseResourceGateway.java

@@ -9,6 +9,9 @@ public interface WarehouseResourceGateway {
     void scrapPallet(String customerId, long palletId);
     WarehousePalletReference resolvePallet(String palletCode);
     WarehousePalletReference resolvePallet(long palletId);
+    default WarehousePalletReference inspectPallet(String palletCode) {
+        return resolvePallet(palletCode);
+    }
     default WarehouseLocationReference resolveLocation(long warehouseId, String locationCode) {
         throw new UnsupportedOperationException("Warehouse location resolution is not configured");
     }

lastleg-service/src/main/java/com/baiyue/lastleg/pda/warehouse/service/PdaWarehouseService.java

@@ -41,7 +41,7 @@ public class PdaWarehouseService {
     }
 
     public PdaWarehouseResponses.Pallet pallet(long warehouseId, PdaWarehouseRequests.Scan request) {
-        WarehouseResourceGateway.WarehousePalletReference pallet = warehouse.resolvePallet(code(request.code()));
+        WarehouseResourceGateway.WarehousePalletReference pallet = warehouse.inspectPallet(code(request.code()));
         if (pallet == null) throw notFound("Warehouse pallet was not found");
         if (pallet.warehouseId() != warehouseId) throw conflict("Pallet belongs to another overseas warehouse");
         WarehouseResourceGateway.WarehouseLocationReference location = warehouse.resolveLocation(warehouseId,