Fix WorkflowEscalation date model import

app/modules/alerts/models.py

@@ -1,6 +1,6 @@
-from __future__ import annotations
+from __future__ import annotations
 
-from datetime import datetime, timezone
+from datetime import date, datetime, timezone
 
 from sqlalchemy import Boolean, Date, DateTime, ForeignKey, Integer, String, Text
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -73,3 +73,4 @@ class WorkflowEscalation(CommonBase):
     assigned_to = relationship("User", foreign_keys=[assigned_to_user_id])
     acknowledged_by = relationship("User", foreign_keys=[acknowledged_by_user_id])
     resolved_by = relationship("User", foreign_keys=[resolved_by_user_id])
+