fix: Handle application errors in Sentry (#1982)

- Handle notification errors for attachment messages
- Fix empty identifiers being passed
- Fix 404 when invalid source id
- Handle webhook exceptions

spec/controllers/api/v1/widget/conversations_controller_spec.rb

@@ -25,6 +25,21 @@ RSpec.describe '/api/v1/widget/conversations/toggle_typing', type: :request do
         expect(json_response['status']).to eq(conversation.status)
       end
     end
+
+    context 'with a conversation but invalid source id' do
+      it 'returns the correct conversation params' do
+        allow(Rails.configuration.dispatcher).to receive(:dispatch)
+
+        payload = { source_id: 'invalid source id', inbox_id: web_widget.inbox.id }
+        token = ::Widget::TokenService.new(payload: payload).generate_token
+        get '/api/v1/widget/conversations',
+            headers: { 'X-Auth-Token' => token },
+            params: { website_token: web_widget.website_token },
+            as: :json
+
+        expect(response).to have_http_status(:not_found)
+      end
+    end
   end
 
   describe 'POST /api/v1/widget/conversations' do