test(phase4): provision overseas lifecycle fixtures

lastleg-service/src/main/java/com/baiyue/lastleg/relabel/controller/RelabelApplicationController.java

@@ -27,7 +27,7 @@ public class RelabelApplicationController {
     public ApiResponse<RelabelResponses.Detail> create(@AuthenticationPrincipal AuthenticatedUser user,
         @Valid @RequestBody RelabelRequests.Create request) {
         requirePlatform(user);
-        return ApiResponse.success(service.create("0", operator(user), request));
+        return ApiResponse.success(service.create(requiredCustomer(request.customerId()), operator(user), request));
     }
     @GetMapping
     @PreAuthorize("hasAuthority('" + OverseasPermissions.RELABEL_ORDER_LIST + "')")
@@ -60,5 +60,12 @@ public class RelabelApplicationController {
             throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Platform application required");
         }
     }
+    private String requiredCustomer(String customerId) {
+        String value = customerId == null ? null : customerId.trim();
+        if (value == null || value.isEmpty() || "0".equals(value)) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Target customerId is required");
+        }
+        return value;
+    }
     private String operator(AuthenticatedUser user) { return user.userId() == null ? user.username() : String.valueOf(user.userId()); }
 }

lastleg-service/src/main/java/com/baiyue/lastleg/relabel/dto/RelabelRequests.java

@@ -16,6 +16,7 @@ public final class RelabelRequests {
     private RelabelRequests() {}
 
     public record Create(
+        @Size(max = 32) String customerId,
         @NotBlank @Size(max = 128) String customerOrderNo,
         @NotBlank @Size(max = 128) String overseasWarehouseId,
         @NotNull LocalDateTime labelDeadline,