feat: trace task sources to fixed workflow activations and rounds

sdk/go/examples/workflow/main.go

@@ -145,6 +145,28 @@ func run() error {
 		case <-time.After(100 * time.Millisecond):
 		}
 	}
+	steps, err := client.GetWorkflowSteps(ctx, accepted.Instance.ID)
+	if err != nil {
+		return err
+	}
+	verified := 0
+	for _, step := range steps.Steps {
+		if step.TaskID == nil {
+			continue
+		}
+		source, err := client.GetTaskSource(ctx, *step.TaskID)
+		if err != nil {
+			return err
+		}
+		if source.Workflow == nil || source.Workflow.WorkflowID != accepted.Instance.ID || source.Workflow.DefinitionVersionID != accepted.Instance.DefinitionVersionID || source.Workflow.StepID != step.ID || source.Workflow.ActivationID != *step.ActivationID || source.Workflow.ActivationSequence != 1 {
+			return errors.New("workflow task source mismatch")
+		}
+		verified++
+	}
+	if verified != 3 {
+		return errors.New("incomplete workflow task sources")
+	}
+	fmt.Printf("workflow_sources_verified=%d fixed_version=%s\n", verified, accepted.Instance.Version)
 	stop()
 	err = <-done
 	waited = true