Version path segment is not added to compiled CSS URLs

It appears as though compiled CSS is not including the version path segment in ember-cli-addon-docs deployments that use versioned docs. See https://github.com/Addepar/ember-table/issues/593 for an example.

The ember-table demo there is referring to an SVG in CSS that is failing to load with a 404. This is because the file is deployed to the version directory at `/ember-table/latest/@addepar/style-toolbox/assets/images/checkmark.svg` while the CSS is pointing to `/ember-table/@addepar/style-toolbox/assets/images/checkmark.svg`. The compiled CSS is missing the `/latest/` segment of the URL path.

Comienza con la generación de la URL del CSS compilado y el comportamiento del despliegue versionado descritos en este issue, usando el ejemplo de ember-table y su ruta SVG fallida como reproducción. Traza por qué se omite `/latest/` de la URL del CSS y, después, verifica que la ruta generada resuelve al asset bajo el directorio de la versión.

Escrito por el modelo de indexación a partir del texto del issue.