feat(lastleg): query commercial sources independently of fulfillment types

lastleg-service/src/main/java/com/baiyue/lastleg/dto/LastlegOrderRequests.java

@@ -37,7 +37,10 @@ public final class LastlegOrderRequests {
         Boolean detained,
         LocalDateTime createdFrom,
         LocalDateTime createdTo,
-        SailingStage sailingStage
+        SailingStage sailingStage,
+        @Size(max = 64) String businessType,
+        @Size(max = 128) String businessOrderNo,
+        @Size(max = 128) String externalBookingNo
     ) {
         public Query {
             if (page == null || page == 0) page = 1L;

lastleg-service/src/main/java/com/baiyue/lastleg/dto/LastlegOrderSummary.java

@@ -74,6 +74,9 @@ public record LastlegOrderSummary(
     LocalDateTime createdAt,
     LocalDateTime updatedAt,
     @Schema(description = "同一主单关联的全部换标子单及各自状态，按创建时间排序")
-    List<RelabelSubOrder> relabelApplications
+    List<RelabelSubOrder> relabelApplications,
+    BusinessSource businessSource
 ) {
+    @Schema(description = "从正式单据关联读取的商业来源；与履约类型 orderType 独立")
+    public record BusinessSource(String businessType, String label, String businessOrderNo, String externalBookingNo) { }
 }