authentik_provider_oauth2.allowed_redirect_uris is list(map(string)) and the
API always stores a redirect_uri_type key on each entry. The module only set
matching_mode and url, so every plan showed the Grafana provider being updated
in-place (state map had 3 keys, config map had 2) and never converged.
Add redirect_uri_type to the redirect_uris object, defaulting to
"authorization". `terragrunt plan` now reports no changes.