Reset to LastWorkflowTaskCompleted doesn't work for workflows without a single completed workflow task

[mfateev]

Expected Behavior

Reset should work for all workflows. If a workflow timed out without any workflow task started event, it should just reset to its startWorkflowExecutionEvent.

Actual Behavior

From Slack

Hi team! I'm trying to replay history of some of workflows. Some of them have events WorkflowExecutionStarted -> DecisionTaskScheduled -> WorkflowExecutionTimedOut

/usr/local/bin # ./cadence --ad cadence-frontend:7933 --do dikbm_integration_domain workflow reset -w 5f4baa91-8987-422b-97a4-1fed23d71204 -r f9f31434-4bbf-4094-a802-a0e706de7bf6 --reset_type LastDecision
Completed --reason "restart timeout workflow"
resetType: LastDecisionCompleted
Get DecisionFinishID failed
Error: getResetEventIDByType failed
Error Details: no DecisionFinishID
('export CADENCE_CLI_SHOW_STACKS=1' to see stack traces)

[yiminc]

Ran a sample workflow and made sure it timed out before having any WorkflowTaskCompleted Event. Running tctl workflow reset --reset_type LastWorkflow|FirstWorkflow reset the workflow to the corresponding WorkflowTaskScheduled event.