fix(quick-260610-i4x-01): replace node-cron schedule() with setInterval in three broker workers
- poller.ts: setInterval(cb, 5 * 60 * 1000) replaces schedule('*/5 * * * *', cb)
- outboxWorker.ts: setInterval(cb, 15 * 1000) replaces schedule('*/15 * * * * *', cb)
- reminderScheduler.ts: setInterval(cb, 60 * 1000) replaces schedule('* * * * *', cb)
- Remove 'import { schedule } from node-cron' from all three files
- Update doc comments to reflect setInterval and document why (node-cron 4.2.1 silent skip)
- Callback bodies and .catch wrappers unchanged; typecheck clean; 91/91 broker tests pass
Lucas Berger
d9efbc1060