fix(product): Category repository missing ontext (#9688)

**What**
- Fix product category repository missing context passed to down level methods
- Ensure the base repository when getting the active manager returns a fresh one if possible instead of the global one in order to prevent shared entity map by mistake

packages/core/utils/src/dal/mikro-orm/mikro-orm-repository.ts

@@ -54,7 +54,7 @@ export class MikroOrmBase<T = any> {
     transactionManager,
     manager,
   }: Context = {}): TManager {
-    return (transactionManager ?? manager ?? this.manager_) as TManager
+    return (transactionManager ?? manager ?? this.getFreshManager()) as TManager
   }
 
   async transaction<TManager = unknown>(