feat: V2.3.0 role COMMENT 增加 manager 角色，DDL + ALTER TABLE 迁移

src/models.py

@@ -152,7 +152,7 @@ async def _create_tables(pool: aiomysql.Pool):
                     `id` INT AUTO_INCREMENT PRIMARY KEY,
                     `username` VARCHAR(45) UNIQUE NOT NULL,
                     `password_hash` VARCHAR(256) NOT NULL,
-                    `role` VARCHAR(20) DEFAULT 'operator' COMMENT 'admin/operator',
+                    `role` VARCHAR(20) DEFAULT 'operator' COMMENT 'admin/manager/operator',
                     `is_active` TINYINT DEFAULT 1,
                     `create_time` DATETIME DEFAULT CURRENT_TIMESTAMP
                 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
@@ -344,6 +344,15 @@ async def _create_tables(pool: aiomysql.Pool):
             except Exception:
                 pass
 
+            # V2.3.0 迁移：tb_user 角色增加 manager
+            try:
+                await cur.execute(
+                    "ALTER TABLE tb_user MODIFY COLUMN `role` VARCHAR(20) DEFAULT 'operator' "
+                    "COMMENT 'admin/manager/operator'"
+                )
+            except Exception:
+                pass
+
             logger.info("数据库表初始化完成")