Previously, install_ingress_for_kind() applied the YAML (which starts
the Caddy pod with email: ""), then patched the ConfigMap afterward.
The pod had already read the empty email and Caddy doesn't hot-reload.
Now template the email into the YAML before applying, so the pod starts
with the correct email from the beginning.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>