v1.4.0 — Public status page and cache-busted download links

status.shruvi.com. A public status page (Better Stack on free tier, Cloudflare DNS-only CNAME). Users can now check whether the backend is healthy at a glance.
Download cache fix. /download/mac and /download/windows now include a ?v=<version> cache-buster. If you were a Windows user downloading "the latest" only to find an older version installed, this is the fix — the old Cache-Control: immutable headers on the binary URLs were poisoning browser caches for up to a year.
Cleanup model upgrade. AI cleanup now uses llama-3.3-70b-versatile for sharper output on the same latency budget.