chore: Refactor WAMonitoringService instance retrieval and improve code readability

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

src/api/services/channels/whatsapp.baileys.service.ts

@@ -1831,8 +1831,6 @@ export class BaileysStartupService extends ChannelStartupService {
             throw new NotFoundException('Group not found');
           }
 
-          console.log('options', options);
-
           if (options.mentionsEveryOne) {
             mentions = group.participants.map((participant) => participant.id);
           } else if (options.mentioned?.length) {