fix: add policy to reject kind 20001 events in event processing

main.go

@@ -102,6 +102,12 @@ func main() {
 		policies.ValidateKind,
 		policies.PreventTimestampsInThePast(600),
 		policies.PreventTimestampsInTheFuture(60),
+		func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
+			if event.Kind == 20001 {
+				return true, "kind 20001 events are not allowed"
+			}
+			return false, ""
+		},
 	)
 
 	policies.ApplySaneDefaults(relay)