feat: sample terminal business latency

internal/storage/mysql/operational_metrics_integration_test.go

@@ -34,6 +34,9 @@ func TestIntegrationOperationalSnapshot(t *testing.T) {
 		{"pulse_tasks", "ix_task_observe_state_available"},
 		{"orbit_deliveries", "ix_delivery_observe_state_available"},
 		{"weave_instances", "ix_workflow_observe_state_updated"},
+		{"orbit_events", "ix_event_observe_type_occurred"},
+		{"pulse_tasks", "ix_task_observe_terminal_completed"},
+		{"weave_instances", "ix_workflow_observe_terminal_completed"},
 	} {
 		var n int
 		if err := db.QueryRowContext(ctx, `SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema=DATABASE() AND table_name=? AND index_name=?`, want.table, want.index).Scan(&n); err != nil {
@@ -52,7 +55,7 @@ func TestIntegrationOperationalSnapshot(t *testing.T) {
 	}
 
 	f := newExecutionFixture(t, ctx, db)
-	f.submit(2)
+	task := f.submit(2)
 	snapshot, err := ReadOperationalSnapshot(ctx, db)
 	if err != nil {
 		t.Fatal(err)
@@ -77,6 +80,14 @@ func TestIntegrationOperationalSnapshot(t *testing.T) {
 	if _, ok := snapshot.WorkflowStates["RUNNING"]; !ok {
 		t.Fatal("missing running workflow state")
 	}
+	f.exec("UPDATE pulse_tasks SET state='SUCCEEDED', completed_at=UTC_TIMESTAMP(6), updated_at=UTC_TIMESTAMP(6), revision=revision+1 WHERE namespace_id=? AND id=?", f.resources.NamespaceID, task.ID)
+	completed, err := ReadOperationalSnapshot(ctx, db)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if completed.TaskTerminalLatencySeconds < 0 || completed.TaskTerminalLatencyMaxSeconds < 0 {
+		t.Fatalf("negative terminal latency: %#v", completed)
+	}
 
 	cancelled, cancelNow := context.WithCancel(ctx)
 	cancelNow()