M15: synchronize contracts and acceptance

backend/app/models/__init__.py

@@ -7,6 +7,7 @@ from app.models.idempotency import IdempotencyRecord
 from app.models.inspection import Inspection
 from app.models.maintenance import MaintenanceRecord
 from app.models.outbox import OutboxEvent
+from app.models.revoked_session import RevokedSession
 from app.models.user import User
 from app.models.vehicle import Vehicle
 
@@ -20,6 +21,7 @@ __all__ = [
     "Inspection",
     "MaintenanceRecord",
     "OutboxEvent",
+    "RevokedSession",
     "User",
     "Vehicle",
 ]

backend/app/models/revoked_session.py

@@ -0,0 +1,16 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, String
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.db import Base
+from app.models.mixins import TimestampMixin, UUIDPrimaryKeyMixin
+
+
+class RevokedSession(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+    __tablename__ = "revoked_sessions"
+
+    token_hash: Mapped[str] = mapped_column(String(64), unique=True, index=True, nullable=False)
+    expires_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, index=True
+    )