Launch Workflow Execution

Once the WE is in READY_FOR_LAUNCH status, call the POST /payments/workflow_execution/{workflowExecutionId}/actions/execute endpoint.

The WE proceeds through the following statuses. These statuses will be applied to each WEO and the WE as a whole.

1. EXECUTION_IN_PROGRESS: The execution process has started.
2. EXECUTION_COMPLETED or EXECUTION_FAILED: The execution completed or failed. These are finite states.