ListEvaluationHistory now enforces max page size.

It is currently valued at the same as the default page size. We might
raise it once we have more details about the performance impact of the
endpoint.

internal/controlplane/handlers_evalstatus.go

@@ -37,6 +37,10 @@ import (
 
 const (
 	defaultPageSize uint64 = 25
+	// Maximum page size has a conservative value at the moment,
+	// we can raise it once we have more insight on its
+	// performance impact.
+	maxPageSize uint64 = 25
 )
 
 // ListEvaluationHistory lists current and past evaluation results for
@@ -63,6 +67,10 @@ func (s *Server) ListEvaluationHistory(
 		size = in.GetCursor().GetSize()
 	}
 
+	if size > maxPageSize {
+		return nil, status.Error(codes.InvalidArgument, "invalid cursor")
+	}
+
 	// process filter
 	opts := []history.FilterOpt{}
 	opts = append(opts, FilterOptsFromStrings(in.GetEntityType(), history.WithEntityType)...)