fix(cron): add retry policy for one-shot jobs on transient errors (#24355) (openclaw#24435) thanks @hugenshen

Verified:
- pnpm install --frozen-lockfile
- pnpm check
- pnpm test -- --run src/cron/service.issue-regressions.test.ts src/config/config-misc.test.ts

Co-authored-by: hugenshen <16300669+hugenshen@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/config/schema.help.quality.test.ts

@@ -108,6 +108,10 @@ const TARGET_KEYS = [
   "cron.enabled",
   "cron.store",
   "cron.maxConcurrentRuns",
+  "cron.retry",
+  "cron.retry.maxAttempts",
+  "cron.retry.backoffMs",
+  "cron.retry.retryOn",
   "cron.webhook",
   "cron.webhookToken",
   "cron.sessionRetention",