* Fix flowchart next activity scheduling bug
This fixes a bug where the Flowchart activity would schedule connected activities regardless of the outcome of the completed activity.
* Cancel activity execution when cancellation token is triggered.
* Enable user to handle HTTP endpoint validation failures as outcomes
* Don't respond with full details in case of HTTP Endpoint faults for security
* Implement Incident Strategy interface and resolver
* Add ActivityIncident model
* Add IncidentCount and Incidents properties and update migrations
* Expose incident strategies API endpoint
* Update API client with Incident Strategy models
* Replace Fault with Incidents
* Register fault status when any children have faulted
* Map incident count
* Remove unnecessary AlreadyCompleted result
* Ensure next activities are scheduled only if activity completed normally
* Incident roundtrip and fix workflow instance realtime updates
* Remove unused variable
* Add integration tests
