add possibility to define an activity text for each workflow which will be written to the activity stream

[j-ed]

Enhancement request

For compliance reasons, it would be nice to be able to define an activity text for each workflow which then will be written to the activity stream of a user. Alternatively a text returned by the external script could be written to the activity stream. This would allow to get notice of the processing done by a workflow script. It should be possible to use the available place holders in that text string.

Example: Imagine you've created an external script which converts an uploaded 3gp-video to a mp4-video. As soon as you uploaded a file a message like "You have created xvz-video.3gp" is being logged. Next an external script is executed which converts the file to a mp4-video (xyz-video.mp4) and the original file is being deleted.

As a result you will see a file named "xyz-video.mp4" on your server but not the file "xyz-video.3gp" anymore. Currently the activity stream doesn't contain any entry about the external script execution nor the file renaming and how/why it has happened.