fix: do not retry rnf bad request

app/services/rnf_service.rb

@@ -8,6 +8,10 @@ class RNFService
       Success(body)
     in Failure(code:, reason:) if code.in?(401..403)
       Failure(API::Client::Error[:unauthorized, code, false, reason])
+    # 400 errors are due to invalid rfn code
+    # it cannot be fixed so we do not retry
+    in Failure(code: 400, reason:)
+      Failure(API::Client::Error[:bad_request, code, false, reason])
     else
       result
     end

spec/models/champs/rnf_champ_spec.rb

@@ -72,6 +72,15 @@ describe Champs::RNFChamp, type: :model do
         expect(subject.failure.reason).to be_a(API::Client::HTTPError)
       }
     end
+
+    context 'failure (http 400)' do
+      let(:status) { 400 }
+      let(:response_type) { 'invalid' }
+      it {
+        expect(subject.failure.retryable).to be_falsey
+        expect(subject.failure.reason).to be_a(API::Client::HTTPError)
+      }
+    end
   end
 
   describe 'for_export' do