给api添加唯一键，避免重复生成

Signed-off-by: 勤快的小晴同学 <941403820@qq.com>

resource/pandax_iot.sql

@@ -855,6 +855,7 @@ CREATE TABLE `sys_apis`  (
   `api_group` varchar(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT 'api组',
   `method` varchar(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '方法',
   PRIMARY KEY (`id`) USING BTREE
+  UNIQUE KEY `sys_apis_udk` (`path`,`method`)
 ) ENGINE = InnoDB AUTO_INCREMENT = 206 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
 
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