new init

apps/backend/app/models/session.py

@@ -0,0 +1,14 @@
+from app.core.database import Base
+from sqlalchemy import Column, Integer, String, ForeignKey, DateTime
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+class Session(Base):
+    __tablename__ = "sessions"
+
+    id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    token = Column(String(64), unique=True, nullable=False, index=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    user = relationship("User")