feat:新增投顾工作台相关接口

model/portfolio_benchmark.py

@@ -0,0 +1,26 @@
+"""portfolio_benchmark 组合基准配置表 ORM（投顾Agent 再平衡参照，运营可调整；工作台只读展示）。"""
+from __future__ import annotations
+
+from datetime import datetime
+from decimal import Decimal
+from typing import Any
+
+from sqlalchemy import BigInteger, DateTime, JSON, Numeric, String, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from model.base import Base
+
+
+class PortfolioBenchmark(Base):
+    __tablename__ = "portfolio_benchmark"
+    __table_args__ = {"comment": "组合基准配置表（投顾Agent 再平衡参照，运营可调整）"}
+
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    risk_level: Mapped[str] = mapped_column(String(16))
+    target_allocation: Mapped[dict[str, Any] | None] = mapped_column(JSON)
+    drift_threshold: Mapped[Decimal] = mapped_column(Numeric(5, 2), server_default="5.00")
+    status: Mapped[str] = mapped_column(String(8), server_default="启用")
+    create_time: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
+    update_time: Mapped[datetime] = mapped_column(
+        DateTime, server_default=func.now(), onupdate=func.now()
+    )