test(lastleg): validate shared appointment contract references

lastleg-service/src/test/java/com/baiyue/lastleg/fleet/trip/FleetTripApiContractTest.java

@@ -66,6 +66,16 @@ class FleetTripApiContractTest {
             .contains("UNIQUE KEY uk_fleet_trip_history_version (trip_id,record_version)");
     }
 
+    /** 预约批次引用解析到正式海外契约，同时继续拒绝未知文件和缺失定义。 */
+    @Test void appointmentReferencesResolveWithoutAllowingUnknownContracts() {
+        verifyRefs(Map.of("$ref", "overseas-business-v1.yaml#/components/schemas/DispatchBatchReference"), Map.of());
+        assertThatThrownBy(() -> verifyRefs(Map.of("$ref", "unknown-v1.yaml#/components/schemas/DispatchBatchReference"), Map.of()))
+            .isInstanceOf(AssertionError.class);
+        assertThatThrownBy(() -> verifyRefs(Map.of("$ref", "overseas-business-v1.yaml#/components/schemas/MissingDispatchBatch"), Map.of()))
+            .isInstanceOf(AssertionError.class);
+    }
+
+    /** 校验允许的跨文件合同引用和 JSON Pointer 所指对象均存在。 */
     private static void verifyRefs(Object node, Map<String, Object> root) {
         if (node instanceof Map<?, ?> map) {
             if (map.get("$ref") instanceof String reference) {
@@ -74,7 +84,7 @@ class FleetTripApiContractTest {
                 if(!reference.startsWith("#/")) {
                     String[] parts=reference.split("#",2);
                     assertThat(parts).hasSize(2);
-                    assertThat(Path.of(parts[0]).getFileName().toString()).isIn("fleet-quote-candidates-v1.yaml","fleet-trips-v1.yaml","fleet-capacity-offers-v1.yaml");
+                    assertThat(Path.of(parts[0]).getFileName().toString()).isIn("fleet-quote-candidates-v1.yaml","fleet-trips-v1.yaml","fleet-capacity-offers-v1.yaml","overseas-business-v1.yaml");
                     try { value=new Yaml().load(Files.readString(Path.of("src/main/resources/openapi",parts[0]))); }
                     catch(java.io.IOException error) { throw new java.io.UncheckedIOException(error); }
                     pointer="#"+parts[1];