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## What changed?
When a workflow is reset, `ApplyWorkflowExecutionStartedEvent`
re-registers the start-event callbacks using the reset operation's
request ID. `HandleNexusCompletion` cannot find a matching
`BufferedStart` and discards the completion. The `resetRequestID` param
is removed from `WorkflowResetter.ResetWorkflow` and the original
request ID is used. `findStartRequestID` reads the original request ID
back from `WorkflowExecutionInfo.RequestIds` by finding the
`EVENT_TYPE_WORKFLOW_EXECUTION_STARTED` entry.
## Why?
CHASM scheduler relies on callback `request_id` to match WF completions
to originating `BufferedStart` entries. When it cannot be found the
scheduler is permanently stuck with the workflow marked as still
running.
## How did you test it?
- [X] built
- [ ] run locally and tested manually
- [ ] covered by existing tests
- [ ] added new unit test(s)
- [X] added new functional test(s)
-
`TestScheduledWorkflowDoubleReset_SchedulerSeesCompletion_{HSM,CHASM}Callbacks`:
create a schedule, trigger immediately, reset the workflow twice, signal
the completion to complete, poll `ListSchedules` until scheduler shows
`COMPLETED`.
## Potential risks
CHASM scheduler has not been enabled in production yet, the blast radius
should be minimal.