fix: validator sign stats.

job/model/blocksignaturemodel.go

@@ -130,7 +130,7 @@ func (m *customBlockSignatureModel) ValidatorSignStats(ctx context.Context, sign
 	}
 	query = query[:len(query)-1] + ")"
 
-	query += fmt.Sprintf(" and timestamp >= now() - interval '%d days'", days)
+	query += fmt.Sprintf(" and timestamp >= now() - interval '%d days' group by day", days)
 	var resp []*BlockCountDay
 	err := m.conn.QueryRowCtx(ctx, &resp, query, vars...)
 	switch err {