Enhance ingestor and manager classes with notification handling
- Integrated NotificationHandler into Ingestor, DataManager, IngestorManager, and OpcManager for improved error reporting and monitoring.
- Updated methods to send notifications on critical events such as Kafka publishing errors, OPC connection issues, and cycle count warnings.
- Refactored related tests to ensure coverage of new notification functionalities and validate integration with existing components.
- Improved logging and error handling across the system to enhance traceability and operational insights.
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