phase 3 23 qr-scan-check

backend/database/models.py

@@ -1,4 +1,5 @@
 import enum
+import uuid
 from datetime import datetime, timezone
 from sqlalchemy import String, Integer, ForeignKey, DateTime, Enum, Boolean
 from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
@@ -55,6 +56,11 @@ class Ticket(Base):
     )
     idempotency_key: Mapped[str] = mapped_column(String, unique=True, nullable=True)
     pdf_url: Mapped[str | None] = mapped_column(String, nullable=True)
+    # nullable=True — безопасно для существующих строк; новые билеты получают UUID автоматически
+    secret_token: Mapped[str | None] = mapped_column(
+        String, unique=True, index=True, nullable=True,
+        default=lambda: str(uuid.uuid4()),
+    )
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
     updated_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True),