Add ability to Pause/Resume and Stop an Workflow
Changes:
- Ability to Pause/Resume a workflow. Use query to the flow function
pause-flow={req_id}
orresume-flow={req_id}
- Ability to Stop a workflow. Use query to the flow function
stop-flow={req_id}
- In Memory StateStore Support (for Async and DAG one need to use external StateStore)
- Ability to pass external requestId (one can pass an requestID with
X-Faas-Flow-Reqid