Add unit tests for orchestrator activities and workflows
- Implement tests for Activities class, covering initialization and prepare_activity method.
- Create tests for Couchbase class, including successful and failed query loading.
- Add tests for SlotManager class, verifying OPC slot loading and active ingestor retrieval.
- Develop tests for TemporalManager class, focusing on schedule loading functionality.
- Introduce tests for Orchestrator class, ensuring proper execution of workflow activities.
- Establish a new test suite for orchestrator activities and workflows in the tests directory.
