Docker Engine 27.0 to 28.0.0 reports an IPv6 network gateway with its
prefix length (fd00::1/64) until the daemon restarts (moby/moby#49520).
The Docker CLI 29 and Compose 5 in the helper image reject it, so
deployments failed and the upgrade left Coolify stopped.
- Stop the upgrade before it changes containers when the coolify network
has such a gateway, and tell the user to restart or upgrade Docker.
- Create a new coolify network again without IPv6 when Docker reports
its gateway with a prefix.
- Report an error, not "Upgrade complete", when the new Coolify
containers do not start.
- Add the fix to deployment errors that contain this ParseAddr failure.
Fixes#11583
