Step 8：数据管理（Queries + SDV/SDR 进度）

backend/app/models/verification.py

@@ -0,0 +1,27 @@
+import uuid
+from datetime import datetime, date
+
+from sqlalchemy import Date, DateTime, ForeignKey, Integer, String, Text, UniqueConstraint, func
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base_class import Base
+
+
+class VerificationProgress(Base):
+    __tablename__ = "verification_progress"
+    __table_args__ = (UniqueConstraint("study_id", "subject_id", "level", name="uq_verification_subject_level"),)
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    study_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("studies.id"), index=True, nullable=False)
+    site_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("sites.id"), index=True, nullable=False)
+    subject_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("subjects.id"), index=True, nullable=False)
+    level: Mapped[str] = mapped_column(String(10), nullable=False)  # SDR / SDV
+    percent: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
+    last_verified_at: Mapped[date | None] = mapped_column(Date, nullable=True)
+    verifier_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
+    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
+    )