feat: 增强日历功能并集成 AgentScope 代理服务

backend/src/models/inbox_messages.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import uuid
 from enum import Enum
 
-from sqlalchemy import String, Text
+from sqlalchemy import Boolean, String, Text
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import Mapped, mapped_column
 
@@ -60,7 +60,7 @@ class InboxMessage(TimestampMixin, Base):
         nullable=True,
     )
     is_read: Mapped[bool] = mapped_column(
-        String(10),
+        Boolean,
         nullable=False,
         default=False,
     )