Refactored WAMonitoringService to retrieve instances using Prisma's `findMany` method with a dynamic `where` clause.
This change simplifies the code and makes it more maintainable.
It also removes the deprecated `for...of` loop and the unnecessary instantiation of objects.
The new implementation provides better performance and is more aligned with the current best practices.
Modified files:
- src/api/services/monitor.service.ts
