Circuits handling

backend/app/models/circuit.py

@@ -0,0 +1,12 @@
+from sqlalchemy import Column, DateTime, BigInteger, ForeignKey
+from sqlalchemy.sql import func
+from app.db.session import Base
+
+
+class Circuit(Base):
+    __tablename__ = "circuits"
+    
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    local_flight_id = Column(BigInteger, ForeignKey("local_flights.id", ondelete="CASCADE"), nullable=False, index=True)
+    circuit_timestamp = Column(DateTime, nullable=False, index=True)
+    created_at = Column(DateTime, nullable=False, server_default=func.current_timestamp())