feat: SAC 0.7.0 display_name columns and event severity overrides

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

backend/app/api/v1/settings.py

@@ -23,7 +23,11 @@ from app.services.notification_settings import (
     upsert_webhook_channel,
 )
 from app.services.telegram_notify import TelegramNotConfiguredError, TelegramSendError, send_telegram_test_message
-from app.services.webhook_notify import WebhookNotConfiguredError, WebhookSendError, send_webhook_test_message
+from app.services.event_severity_overrides import (
+    SOURCE_DB,
+    list_severity_override_items,
+    replace_severity_overrides,
+)
 
 router = APIRouter(prefix="/settings", tags=["settings"])
 
@@ -328,3 +332,63 @@ def test_email_settings(
     except EmailSendError as exc:
         raise HTTPException(status_code=502, detail=str(exc)) from exc
     return ChannelTestResponse(message="Тестовое письмо отправлено по SMTP")
+
+
+class EventSeverityOverrideRow(BaseModel):
+    event_type: str
+    default_severity: str
+    override_severity: str | None = None
+
+
+class EventSeverityOverridesResponse(BaseModel):
+    items: list[EventSeverityOverrideRow]
+    source: str = Field(description="db — overrides хранятся в PostgreSQL")
+
+
+class EventSeverityOverridesUpdate(BaseModel):
+    overrides: dict[str, str | None] = Field(
+        description="event_type → severity; null или пустая строка сбрасывает override",
+    )
+
+
+@router.get("/notifications/severity-overrides", response_model=EventSeverityOverridesResponse)
+def get_severity_overrides(
+    db: Session = Depends(get_db),
+    _user=Depends(require_admin),
+) -> EventSeverityOverridesResponse:
+    items = list_severity_override_items(db)
+    return EventSeverityOverridesResponse(
+        items=[
+            EventSeverityOverrideRow(
+                event_type=i.event_type,
+                default_severity=i.default_severity,
+                override_severity=i.override_severity,
+            )
+            for i in items
+        ],
+        source=SOURCE_DB,
+    )
+
+
+@router.put("/notifications/severity-overrides", response_model=EventSeverityOverridesResponse)
+def update_severity_overrides(
+    body: EventSeverityOverridesUpdate,
+    db: Session = Depends(get_db),
+    _user=Depends(require_admin),
+) -> EventSeverityOverridesResponse:
+    try:
+        items = replace_severity_overrides(db, body.overrides)
+        db.commit()
+    except ValueError as exc:
+        raise HTTPException(status_code=422, detail=str(exc)) from exc
+    return EventSeverityOverridesResponse(
+        items=[
+            EventSeverityOverrideRow(
+                event_type=i.event_type,
+                default_severity=i.default_severity,
+                override_severity=i.override_severity,
+            )
+            for i in items
+        ],
+        source=SOURCE_DB,
+    )