Remove the tls { dns cloudflare ... } directive and fall back to
Caddy's default automatic HTTPS (HTTP-01 / TLS-ALPN). The
Cloudflare DNS plugin was causing issues during cert provisioning;
standard ACME works fine as long as port 80/443 reach the server.
Also drop the now-unused cloudflare_token variable from group_vars.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>