manager: localize dossier enums

In the previous commit, we cleaned up the localization of the
Dossier.state enum. This prevented administrate from crashing, but now
the dossier enum are no longer localized in the Manager.

By using a `Field::Enum` type, we instruct the administrate plugin
to look up our localized name for the Dossier state enum.

Gemfile

@@ -6,6 +6,7 @@ gem 'active_model_serializers'
 gem 'activestorage-openstack'
 gem 'active_storage_validations'
 gem 'administrate', git: 'https://github.com/thoughtbot/administrate.git', ref: 'refs/pull/1972/head' # Provides an administration UI (pull request #1972 has fixes for Rails 6.1.3.2)
+gem 'administrate-field-enum' # Allow using Field::Enum in administrate
 gem 'after_party'
 gem 'anchored'
 gem 'bcrypt'

Gemfile.lock

@@ -102,6 +102,8 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
+    administrate-field-enum (0.0.9)
+      administrate (~> 0.12)
     aes_key_wrap (1.1.0)
     after_party (1.11.2)
     anchored (1.1.0)
@@ -776,6 +778,7 @@ DEPENDENCIES
   active_storage_validations
   activestorage-openstack
   administrate!
+  administrate-field-enum
   after_party
   anchored
   annotate

app/dashboards/dossier_dashboard.rb

@@ -10,7 +10,7 @@ class DossierDashboard < Administrate::BaseDashboard
   ATTRIBUTE_TYPES = {
     id: Field::Number.with_options(searchable: true),
     procedure: Field::HasOne,
-    state: Field::String,
+    state: Field::Enum,
     user: Field::BelongsTo,
     text_summary: Field::String.with_options(searchable: false),
     created_at: Field::DateTime,