feat:风控Agent（规则引擎+前置拦截+人工处置+工单闭环）

model/fin_transaction.py

@@ -0,0 +1,29 @@
+"""fin_transaction 成交流水 ORM 模型（成交后落库的账务凭证）。"""
+from __future__ import annotations
+
+from datetime import datetime
+from decimal import Decimal
+
+from sqlalchemy import BigInteger, DateTime, Numeric, String, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from model.base import Base
+
+
+class FinTransaction(Base):
+    __tablename__ = "fin_transaction"
+    __table_args__ = {"comment": "成交流水表（成交后落库）"}
+
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    transaction_no: Mapped[str] = mapped_column(String(32), unique=True)
+    order_id: Mapped[int | None] = mapped_column(BigInteger)
+    customer_id: Mapped[int] = mapped_column(BigInteger)
+    product_id: Mapped[int] = mapped_column(BigInteger)
+    operator_id: Mapped[int | None] = mapped_column(BigInteger)
+    transaction_type: Mapped[str] = mapped_column(String(16))
+    amount: Mapped[Decimal] = mapped_column(Numeric(18, 2))
+    shares: Mapped[Decimal | None] = mapped_column(Numeric(18, 4))
+    nav: Mapped[Decimal | None] = mapped_column(Numeric(12, 6))
+    fee: Mapped[Decimal] = mapped_column(Numeric(12, 2), server_default="0")
+    status: Mapped[str] = mapped_column(String(16), server_default="已确认")
+    create_time: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())