Function get_templates 

pub async fn get_templates(
    infra: &InfraContext<'_>,
    token: &str,
    params: &GetTemplateParams,
) -> Result<Vec<BosSessionTemplate>, Error>

List BOS session templates visible to the caller.

When params.group_name is unset the lookup spans every HSM group the token already grants access to. The backend filters templates whose targets intersect the resolved group set (and their member xnames), so the response stays scoped to what the caller could see by other means. Results are sorted by template name for stable output.