feat: more role backend and admin/writer roles additions and adjustments

test/activity_support_test.go

@@ -26,6 +26,7 @@ type activityProbeRepo struct {
 	deleteErr   error
 	deleteCalls int
 	readErr     error
+	maxReads    int
 	sizeErr     error
 	sizeBytes   *int64
 	oldestErr   error
@@ -47,6 +48,9 @@ func (p *activityProbeRepo) Append(event audit.Event) (audit.Event, error) {
 func (p *activityProbeRepo) List(filter audit.Filter) (audit.Page, error) {
 	p.reads++
 	p.listCalls = append(p.listCalls, filter)
+	if p.maxReads > 0 && p.reads > p.maxReads {
+		return audit.Page{}, errors.New("read budget exceeded")
+	}
 	if p.readErr != nil {
 		return audit.Page{}, p.readErr
 	}