Initial commit

backend/app/models/snapshot.py

@@ -0,0 +1,13 @@
+from datetime import datetime, timezone
+from sqlalchemy import Integer, Text, DateTime, ForeignKey
+from sqlalchemy.orm import mapped_column, Mapped
+from app.database import Base
+
+
+class UpstreamRateSnapshot(Base):
+    __tablename__ = "upstream_rate_snapshots"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    upstream_id: Mapped[int] = mapped_column(Integer, ForeignKey("upstreams.id", ondelete="CASCADE"), index=True)
+    snapshot_json: Mapped[str] = mapped_column(Text, nullable=False)
+    captured_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.now(timezone.utc), index=True)