Proxies started before v4.4.4 kept the old nginx config after an upgrade:
the upstream IP was resolved only once and IPv6 connections were reset.
- Label new proxies with a configuration version
- Status checks (Sentinel and SSH) recreate a running proxy with an
older or missing version once, at most every 10 minutes
- Remove the old proxy only after the image pull, so a failed pull
keeps it running
Closes#10198
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
