fix(feishu): tolerate missing webhook defaults in older plugin-sdk (openclaw#31639) thanks @liuxiaopai-ai

Verified:
- pnpm test extensions/feishu/src/monitor.state.defaults.test.ts
- pnpm exec vitest run extensions/feishu/src/monitor.state.defaults.test.ts
- pnpm exec oxfmt --check extensions/feishu/src/monitor.state.ts extensions/feishu/src/monitor.state.defaults.test.ts CHANGELOG.md
- CI note: non-required check "check" failed on unrelated  TS errors outside this PR scope.

Co-authored-by: liuxiaopai-ai <73659136+liuxiaopai-ai@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

extensions/feishu/src/monitor.state.defaults.test.ts

@@ -0,0 +1,46 @@
+import { describe, expect, it } from "vitest";
+import {
+  resolveFeishuWebhookAnomalyDefaultsForTest,
+  resolveFeishuWebhookRateLimitDefaultsForTest,
+} from "./monitor.state.js";
+
+describe("feishu monitor state defaults", () => {
+  it("falls back to hard defaults when sdk defaults are missing", () => {
+    expect(resolveFeishuWebhookRateLimitDefaultsForTest(undefined)).toEqual({
+      windowMs: 60_000,
+      maxRequests: 120,
+      maxTrackedKeys: 4_096,
+    });
+    expect(resolveFeishuWebhookAnomalyDefaultsForTest(undefined)).toEqual({
+      maxTrackedKeys: 4_096,
+      ttlMs: 21_600_000,
+      logEvery: 25,
+    });
+  });
+
+  it("keeps valid sdk values and repairs invalid fields", () => {
+    expect(
+      resolveFeishuWebhookRateLimitDefaultsForTest({
+        windowMs: 45_000,
+        maxRequests: 0,
+        maxTrackedKeys: -1,
+      }),
+    ).toEqual({
+      windowMs: 45_000,
+      maxRequests: 120,
+      maxTrackedKeys: 4_096,
+    });
+
+    expect(
+      resolveFeishuWebhookAnomalyDefaultsForTest({
+        maxTrackedKeys: 2048,
+        ttlMs: Number.NaN,
+        logEvery: 10,
+      }),
+    ).toEqual({
+      maxTrackedKeys: 2048,
+      ttlMs: 21_600_000,
+      logEvery: 10,
+    });
+  });
+});