Fix API compatibility and add user/role/permission and asset import/export

backend/alembic.ini

@@ -0,0 +1,51 @@
+# Alembic配置文件
+
+[alembic]
+# 迁移脚本目录
+script_location = alembic
+
+# 迁移版本存储表
+version_table = alembic_version
+
+# 时区设置
+timezone = Asia/Shanghai
+
+# 数据库连接URL（从环境变量读取）
+# sqlalchemy.url = driver://user:pass@localhost/dbname
+sqlalchemy.url = postgresql+asyncpg://postgres:postgres@localhost:5432/asset_management
+
+[post_write_hooks]
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S