完善模型测试与参考文件历史能力

backend/models/reference_file.py

@@ -0,0 +1,17 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, Integer, String, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from database import Base
+
+
+class ReferenceFile(Base):
+    __tablename__ = "reference_files"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    file_name: Mapped[str] = mapped_column(String(255), default="", comment="原始文件名")
+    file_path: Mapped[str] = mapped_column(String(500), default="", comment="MinIO 对象路径")
+    file_size: Mapped[int] = mapped_column(Integer, default=0, comment="文件大小")
+    content_type: Mapped[str] = mapped_column(String(120), default="", comment="文件类型")
+    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())