feat: Introduce flow serializer

packages/backend/src/serializers/index.js

@@ -3,6 +3,8 @@ import roleSerializer from './role.js';
 import permissionSerializer from './permission.js';
 import samlAuthProviderSerializer from './saml-auth-provider.ee.js';
 import appAuthClientSerializer from './app-auth-client.js';
+import flowSerializer from './flow.js';
+import stepSerializer from './step.js';
 
 const serializers = {
   User: userSerializer,
@@ -10,6 +12,8 @@ const serializers = {
   Permission: permissionSerializer,
   SamlAuthProvider: samlAuthProviderSerializer,
   AppAuthClient: appAuthClientSerializer,
+  Flow: flowSerializer,
+  Step: stepSerializer,
 };
 
 export default serializers;