fix(cron): persist delivered flag in job state to surface delivery failures (openclaw#19174) thanks @simonemacario

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: simonemacario <2116609+simonemacario@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/gateway/server-cron.ts

@@ -295,6 +295,7 @@ export function buildGatewayCronService(params: {
           status: evt.status,
           error: evt.error,
           summary: evt.summary,
+          delivered: evt.delivered,
           sessionId: evt.sessionId,
           sessionKey: evt.sessionKey,
           runAtMs: evt.runAtMs,