I added a nasty little func calledenumerateAllTemplates which enumerates all the notification templates defined incoderd/notifications/events.go. Using this, we can determine when we're missing test cases inTestNotificationTemplatesCanRender. I found two, and added those.

This is obviously suboptimal as a strategy: we should be using code-generation and linting. I've covered this incoder/internal#36. In the interim, let's not let the perfect get in the way of better test coverage.

Additionally, this adds the template update message to theTemplateWorkspaceAutoUpdated template so users will be informed of what changed when their template was auto-updated.