Automatic publication of streaming URLs
When publishing events with streaming (e.g., HLS), an additional publication for the streaming URL should be created.
The live scheduler automatically publishes at the beginning of an event
For VOD streaming, an option of the "publish-engage" operation should be added to generate streaming link publications.
Withdrawing published events should remove the publications
The live scheduler removes publications automatically at the end of an event
For VOD streaming, the "retract-engage" operation should be extended to remove the streaming link publications