Create a HAI Email Template

The HAI application exposes an API endpoint which NSS uses to fetch a HTML email template. The template lives in the joinera repo

OpenAPI Spec

The HAI API endpoint is v1/notifications/render-email and is documented in an OpenAPI spec found here: spec

Template & Integration

These two PRs can be used as reference for what is needed on the HAI side:

• https://github.com/joinhandshake/joinera/pull/6246
• https://github.com/joinhandshake/joinera/pull/6276