fix(users/champs/piece_justificative#update): ensure to bump dossier.last_champ_updated_at otherwise instructeurs are not notified when user update their piece_justificative

app/controllers/champs/piece_justificative_controller.rb

@@ -14,7 +14,9 @@ class Champs::PieceJustificativeController < ApplicationController
   def attach_piece_justificative
     @champ = policy_scope(Champ).find(params[:champ_id])
     @champ.piece_justificative_file.attach(params[:blob_signed_id])
-    @champ.save
+    save_succeed = @champ.save
+    @champ.dossier.update(last_champ_updated_at: Time.zone.now.utc) if save_succeed
+    save_succeed
   end
 
   def attach_piece_justificative_or_retry

spec/controllers/champs/piece_justificative_controller_spec.rb

@@ -31,6 +31,10 @@ describe Champs::PieceJustificativeController, type: :controller do
         expect(response.status).to eq(200)
         expect(response.body).to include("##{champ.input_group_id}")
       end
+
+      it 'updates dossier.last_champ_updated_at' do
+        expect { subject }.to change { dossier.reload.last_champ_updated_at }
+      end
     end
 
     context 'when the file is invalid' do