- Optimize the ban matching middleware by using a read-only transaction (`db.View`) for the initial scan, avoiding the single bbolt write lock on every request when no ban matches.
- Implement periodic pruning of stale entries in the upload grouper map to prevent unbounded memory growth over time.
- Avoid redundant parsing of the `max_days` form value in the upload handler.
- Add `WARPBOX_TRUSTED_PROXIES` configuration to restrict accepted forwarded client IP headers to specific proxy IPs/CIDRs, securing client IP resolution.
- Integrate `BanService` into the background cleanup job to automatically purge expired abuse and ban evidence events.
- Update documentation with reverse proxy security guidelines and a production systemd deployment guide.
