fix(lastleg): match looseboard pickup customer identity across collations

lastleg-service/src/main/java/com/baiyue/lastleg/looseboard/mapper/LocalLooseboardOrderMapper.java

@@ -16,7 +16,9 @@ public interface LocalLooseboardOrderMapper extends BaseMapper<LocalLooseboardOr
         + " WHERE p.source_order_id=ll_local_looseboard_order.lastleg_order_id"
         + " AND p.customer_id=ll_local_looseboard_order.customer_id";
     String PICKUP = " FROM ll_warehouse_transfer_order w"
-        + " JOIN ll_fleet_pickup_task t ON t.transfer_order_id=w.id AND t.customer_id=w.customer_id"
+        // 两表客户标识使用各自排序规则，按完整字节身份关联，512 字节覆盖 VARCHAR(128) 的 utf8mb4 上限。
+        + " JOIN ll_fleet_pickup_task t ON t.transfer_order_id=w.id"
+        + " AND CAST(t.customer_id AS BINARY(512))=CAST(w.customer_id AS BINARY(512))"
         + " JOIN ll_fleet_trip f ON f.trip_no=t.trip_no AND f.status IN ('PLANNED','IN_TRANSIT')"
         + " WHERE w.customer_id=ll_local_looseboard_order.customer_id"
         + " AND w.transfer_no=ll_local_looseboard_order.transfer_no";

lastleg-service/src/test/java/com/baiyue/lastleg/looseboard/LocalLooseboardMerchantStatusTest.java

@@ -118,6 +118,25 @@ class LocalLooseboardMerchantStatusTest {
         assertStatus(1, "COMPLETED");
     }
 
+    /** 取货关联按完整客户标识匹配，忽略大小写的字段排序和长多字节前缀均不能串用其他客户事实。 */
+    @Test
+    void pickupFactsMatchTheEntireCustomerIdentityAcrossTextComparisonRules() {
+        String customer = "客".repeat(60) + "A";
+        order(1, customer, "WAITING_INBOUND");
+        jdbc.execute("ALTER TABLE ll_warehouse_transfer_order ALTER COLUMN customer_id VARCHAR_IGNORECASE(128)");
+        jdbc.update("INSERT INTO ll_warehouse_transfer_order VALUES(1,'W1',?)", customer);
+        jdbc.update("INSERT INTO ll_fleet_trip VALUES('T1','IN_TRANSIT')");
+        jdbc.update("INSERT INTO ll_fleet_pickup_task VALUES(1,'T1',?,'PICKED')", customer);
+        assertThat(service.merchantDetail(customer, "LB1").summary().status()).isEqualTo("PICKING_UP");
+
+        for (String otherCustomer : List.of("客".repeat(60) + "a", "客".repeat(60) + "B")) {
+            jdbc.update("UPDATE ll_fleet_pickup_task SET customer_id=?", otherCustomer);
+            assertThat(service.merchantDetail(customer, "LB1").summary().status()).isEqualTo("PENDING_DISPATCH");
+            assertThat(service.page(customer, query(1, 20, "PICKING_UP")).total()).isZero();
+            assertThat(service.page(customer, query(1, 20, "PENDING_DISPATCH")).total()).isEqualTo(1);
+        }
+    }
+
     /** 取货直送及分车派送按有效排车判断，取消排车和重复托盘关联不污染状态或总数。 */
     @Test
     void directDeliveryIgnoresCancelledDispatchesAndKeepsSplitDeliveryInTransit() {