Add a multiplier to the matrix (#5298)

* add a multiplier to the matrix

* add rounding

* remove scale_factor restrictions

* clamp for overflow error

* update check to match error message

* enforce clamping on < 0 and increase test coverage

* add an invalid scale_factor value to node tests

* increase test coverage

* changelog

src/server/service/table_service.cpp

@@ -61,6 +61,11 @@ std::string getWrongOptionHelp(const engine::api::TableParameters &parameters)
         help = "fallback_speed must be > 0";
     }
 
+    if (parameters.scale_factor <= 0)
+    {
+        help = "scale_factor must be > 0";
+    }
+
     return help;
 }
 } // anon. ns