fix(graphql): handle annotations inside blocks

app/graphql/mutations/dossier_modifier_annotation_ajouter_ligne.rb

@@ -0,0 +1,38 @@
+module Mutations
+  class DossierModifierAnnotationAjouterLigne < Mutations::BaseMutation
+    argument :dossier_id, ID, "Dossier ID", required: true, loads: Types::DossierType
+    argument :instructeur_id, ID, "Instructeur qui demande la modification.", required: true, loads: Types::ProfileType
+    argument :annotation_id, ID, "Annotation ID", required: true
+
+    field :annotation, Types::Champs::RepetitionChampType, null: true
+    field :errors, [Types::ValidationErrorType], null: true
+
+    def resolve(dossier:, annotation_id:, instructeur:)
+      annotation = find_annotation(dossier, annotation_id)
+
+      if annotation.nil?
+        return { errors: ["L’annotation \"#{annotation_id}\" n’existe pas"] }
+      end
+
+      annotation.add_row(dossier.revision)
+
+      { annotation: annotation, errors: nil }
+    end
+
+    def authorized?(dossier:, instructeur:, **args)
+      dossier_authorized_for?(dossier, instructeur)
+    end
+
+    private
+
+    def find_annotation(dossier, annotation_id)
+      stable_id, row = Champ.decode_typed_id(annotation_id)
+
+      Champ.joins(:type_de_champ).find_by(type_de_champ: {
+        type_champ: TypeDeChamp.type_champs.fetch(:repetition),
+        stable_id: stable_id,
+        private: true
+      }, private: true, row: row, dossier: dossier)
+    end
+  end
+end