fix(系统设置): 初始化默认文件上传大小参数

--task=1016193 --user=宋昌昌 系统配置支持自定义文件大小限制-后端-V2 https://www.tapd.cn/55049933/s/1576397

system-setting/backend/src/main/resources/db/migration/2.10.20/dml/V142__2.10.20_init_file_upload.sql

@@ -0,0 +1,6 @@
+SET SESSION innodb_lock_wait_timeout = 7200;
+
+-- 初始化默认参数文件上传大小
+INSERT INTO system_parameter (param_key, param_value, type, sort) VALUES ('base.file.upload.size', '50', 'text', 1);
+
+SET SESSION innodb_lock_wait_timeout = DEFAULT;