Auditoria funcionando

backend/app/models/user.py

@@ -78,6 +78,13 @@ class User(Base):
         back_populates="assigned_to_user", 
         foreign_keys="Ticket.assigned_to"
     )
+    # Refresh tokens: especificar user_id como FK (hay 2 FKs: user_id y revoked_by)
+    refresh_tokens: Mapped[List["RefreshToken"]] = relationship(
+        "RefreshToken",
+        back_populates="user",
+        cascade="all, delete-orphan",
+        foreign_keys="[RefreshToken.user_id]"
+    )
     
     # Unique constraint por tenant
     __table_args__ = (