Initial lightweight AI agent admin

backend/app/models/base.py

@@ -0,0 +1,19 @@
+from datetime import datetime
+from uuid import uuid4
+
+from sqlalchemy import Boolean, DateTime, Integer, String
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.database import Base
+
+
+def new_id() -> str:
+    return uuid4().hex
+
+
+class TimestampMixin:
+    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
+    sort: Mapped[int] = mapped_column(Integer, default=0)
+    is_deleted: Mapped[bool] = mapped_column(Boolean, default=False, index=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)