Target helpers

Function	Returns	Description
`GetTargetById(Id)`	`AbstractTarget or null`	Searches every scene for a target whose Id matches the given GUID string (case-insensitive). Returns the matching target, or null if none is found.
`GetTargetByName(sceneName, targetName)`	`AbstractTarget or null`	Returns the named scene target, or null if the scene or target is missing.
`ExecuteTargetCommand(sceneName, targetName, commandName)`	`bool`	Executes a named `Command` property on the named target within the named scene, using reflection. Returns false if the target is missing, the command property does not exist, or the command's `CanExecute` is false.
`ExecuteTargetCommandById(targetId, commandName)`	`bool`	Executes a named `Command` property on a target identified by its GUID (case-insensitive), searching every scene. Returns false if the target is missing, the command property does not exist, or the command's `CanExecute` is false.

// Start a target on connector trigger
function OnConnectorStartStream() {
    var ok = Project.ExecuteTargetCommand("Scene", "SRT Output", "StartCommand");
    return { result: ok ? "ok" : "error", httpStatus: ok ? 200 : 500 };
}