fetchcommit

type Signal struct {
	RunID       string `json:"run_id" validate:"required"`
	AppBranchID string `json:"app_branch_id" validate:"required"`

	// FlowID and StepID are injected by the flow engine via SignalWithStepContext.
	FlowID string `json:"flow_id,omitempty"`
	StepID string `json:"step_id,omitempty"`
}