Adds two opt-in flags to break the circular dependency discovered during
the 2026-09-12 traefik/keepalived incident: Traefik down -> VIP/hostname
unreachable -> git-guard can't fetch -> stack-deploy.sh traefik blocked ->
can't redeploy traefik to fix Traefik.
-e/--emergency: probes git.bryanmail.net, then the VIP (192.168.4.30), then
each node's direct IP (.31/.32/.33) on Gitea's direct ingress port 3000
(bypasses Traefik/VIP entirely), switches origin to the first reachable one,
then runs the NORMAL sync logic against it (behind/ahead/diverged handling
unchanged — this only changes which host is used, never skips the safety
checks). Prints a reminder to restore the real origin URL afterward; never
persists the swap anywhere.
-f/--force: skips the sync check entirely, for the genuine last-resort case
where Gitea itself (not just routing) is unreachable. Loud warning banner.
Verified git ls-remote succeeds unauthenticated over plain http against
each candidate before writing this, so no credential-smuggling concern.
Bot
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