Fix issue run lookup and heartbeat run summaries

server/src/__tests__/heartbeat-run-summary.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from "vitest";
+import { summarizeHeartbeatRunResultJson } from "../services/heartbeat-run-summary.js";
+
+describe("summarizeHeartbeatRunResultJson", () => {
+  it("truncates text fields and preserves cost aliases", () => {
+    const summary = summarizeHeartbeatRunResultJson({
+      summary: "a".repeat(600),
+      result: "ok",
+      message: "done",
+      error: "failed",
+      total_cost_usd: 1.23,
+      cost_usd: 0.45,
+      costUsd: 0.67,
+      nested: { ignored: true },
+    });
+
+    expect(summary).toEqual({
+      summary: "a".repeat(500),
+      result: "ok",
+      message: "done",
+      error: "failed",
+      total_cost_usd: 1.23,
+      cost_usd: 0.45,
+      costUsd: 0.67,
+    });
+  });
+
+  it("returns null for non-object and irrelevant payloads", () => {
+    expect(summarizeHeartbeatRunResultJson(null)).toBeNull();
+    expect(summarizeHeartbeatRunResultJson(["nope"] as unknown as Record<string, unknown>)).toBeNull();
+    expect(summarizeHeartbeatRunResultJson({ nested: { only: "ignored" } })).toBeNull();
+  });
+});