refactor: simplify parallels smoke helpers

scripts/e2e/parallels/lane-runner.ts

@@ -0,0 +1,18 @@
+import { warn } from "./host-command.ts";
+
+export type SmokeLane = "fresh" | "upgrade";
+export type SmokeLaneStatus = "pass" | "fail";
+
+export async function runSmokeLane(
+  name: SmokeLane,
+  fn: () => Promise<void>,
+  setStatus: (name: SmokeLane, status: SmokeLaneStatus) => void,
+): Promise<void> {
+  try {
+    await fn();
+    setStatus(name, "pass");
+  } catch (error) {
+    setStatus(name, "fail");
+    warn(`${name} lane failed: ${error instanceof Error ? error.message : String(error)}`);
+  }
+}