[FEATURE]: WAIT_FOR_WEBHOOK not exist in this GitHub

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## Describe the Feature Request
I noticed that WAIT_FOR_WEBHOOK and some other system tasks do not exist in this open source project , even they are introduced in the Orkes documentation. So my question is that they are not open but closed implementations?

## Describe Preferred Solution
_A clear and concise description of what you want to happen._

## Describe Alternatives
_A clear and concise description of any alternative solutions or features you've considered._