feat: SAC 0.7.0 display_name columns and event severity overrides

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/models/__init__.py

@@ -5,6 +5,7 @@ from app.models.notification_channel import NotificationChannel
 from app.models.notification_cooldown import NotificationCooldown
 from app.models.notification_policy import NotificationPolicy
 from app.models.problem import Problem, ProblemEvent
+from app.models.event_severity_override import EventSeverityOverride
 from app.models.user import User
 
 __all__ = [
@@ -17,4 +18,5 @@ __all__ = [
     "Problem",
     "ProblemEvent",
     "User",
+    "EventSeverityOverride",
 ]

backend/app/models/event_severity_override.py

@@ -0,0 +1,19 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, String, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.database import Base
+
+
+class EventSeverityOverride(Base):
+    __tablename__ = "event_severity_overrides"
+
+    event_type: Mapped[str] = mapped_column(String(128), primary_key=True)
+    severity: Mapped[str] = mapped_column(String(16), nullable=False)
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False,
+    )