Aug 18 - Fix customer roles's notification radio buttons issue

app/models/user_notification_matrix.py

@@ -66,6 +66,28 @@ def overrides_for_user(user_id) -> dict:
     }
 
 
+def override_for(user_id, event_type):
+    """One account's answer for one event: True, False, or None (inherit).
+
+    Used by notify() to enforce the override on EVERY delivery path, not just
+    matrix broadcasts. Best-effort: any failure returns None (inherit), so a
+    lookup problem can never silently swallow a notification.
+    """
+    import logging
+    if not user_id or not event_type:
+        return None
+    try:
+        row = UserNotificationMatrix.query.filter_by(
+            user_id=user_id, event_type=event_type).first()
+        return row.enabled if row is not None else None
+    except Exception as exc:
+        logging.getLogger(__name__).error(
+            'USER MATRIX | single override lookup failed | user=%s event=%s | %s',
+            user_id, event_type, exc,
+        )
+        return None
+
+
 def overrides_for_event(event_type) -> dict:
     """Return {user_id: bool} — every account's override for one event.