Update return schema of query interface (#492)

* Update return model of query interface

* Update tree data return type hints

* Update code generation and task return types

* Fix inconsistency between ORM query result and schema

backend/app/admin/schema/captcha.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+from pydantic import Field
+
+from backend.common.schema import SchemaBase
+
+
+class GetCaptchaDetail(SchemaBase):
+    image_type: str = Field(description='图片类型')
+    image: str = Field(description='图片内容')