fix(cron): guard against year-rollback in croner nextRun (#30777)

* fix(cron): guard against year-rollback in croner nextRun

Croner can return a past-year timestamp for some timezone/date
combinations (e.g. Asia/Shanghai).  When nextRun returns a value at or
before nowMs, retry from the next whole second and, if still stale,
from midnight-tomorrow UTC before giving up.

Closes #30351

* googlechat: guard API calls with SSRF-safe fetch

* test: fix hoisted plugin context mock setup

---------

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

src/agents/openclaw-tools.plugin-context.test.ts

@@ -6,7 +6,7 @@ const resolvePluginToolsMock = vi.fn((params?: unknown) => {
 });
 
 vi.mock("../plugins/tools.js", () => ({
-  resolvePluginTools: (params: unknown) => resolvePluginToolsMock(params),
+  resolvePluginTools: resolvePluginToolsMock,
 }));
 
 import { createOpenClawTools } from "./openclaw-tools.js";