🐛 修复车辆调度列表排序规则冲突

JOIN 车牌号/租户时统一 utf8mb4_general_ci，并补充车辆表排序规则对齐脚本。

Co-authored-by: Cursor <cursoragent@cursor.com>

doc/sql/transport/blade_transport_vehicle.sql

@@ -57,7 +57,7 @@ CREATE TABLE `blade_transport_vehicle` (
   KEY `idx_transport_vehicle_road_end` (`road_transport_cert_end_date`) USING BTREE,
   KEY `idx_transport_vehicle_annual_end` (`annual_review_end_date`) USING BTREE,
   KEY `idx_transport_vehicle_status` (`status`) USING BTREE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='车辆管理';
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='车辆管理';
 
 -- ----------------------------
 -- Records of blade_menu for transport capacity vehicle

doc/sql/transport/blade_transport_vehicle_collation_20260923.sql

@@ -0,0 +1,4 @@
+-- 对齐车辆表字符串列排序规则，避免与 utf8mb4_general_ci 表 JOIN 报 Illegal mix of collations
+-- 背景：blade_transport_vehicle 建表未显式指定 COLLATE，MySQL 8 默认 utf8mb4_0900_ai_ci
+ALTER TABLE `blade_transport_vehicle`
+  CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;