Chore(): localised improvement to promotion module (#13446)

**What**
- Remove overserialization withing transaction and rely more on internal service or protected method instead which does not serialize and work with Infered entity type
- Slightly rework loop complexity

Overall, this gives a good spare of resources and time spent for serialization

packages/modules/workflow-engine-redis/integration-tests/__tests__/index.spec.ts

@@ -539,7 +539,7 @@ moduleIntegrationTestRunner<IWorkflowEngineService>({
             throwOnError: false,
           })
 
-          await setTimeout(1000)
+          await setTimeout(4000)
 
           expect(lastExepectHaveBeenCalledTimes).toEqual(1)
         })