SIENTIAPDE-1646

Update dependencies and refactor MLFlow activities

- Replaced direct GitHub dependencies in `requirements.txt` with specific versioned packages for `sientia_do` and `sientia_model`.
- Refactored imports in `activities.py` to streamline the code structure.
- Enhanced the `MLFlow` class in `mlflow.py` by introducing a method to resolve model aliases, improving flexibility in model lookups.
- Simplified shutdown logic in `worker.py` for better readability.
- Added new tests for MLFlow activities and improved existing test coverage for data handling and model retraining processes.

laborious/activities/activities.py

@@ -10,14 +10,13 @@ with workflow.unsafe.imports_passed_through():
     from sientia_model.model_repository.mlflow_repository import SientiaMLflowRepository
     from sientia_model.model_repository.plugin_store import PluginStore
 
-    from laborious.utils.connectors_config import build_mlflow_config
-
     from laborious.activities.api import API
     from laborious.activities.gates import Gates
     from laborious.activities.mlflow import MLFlow
     from laborious.activities.model_metrics import ModelMetrics
     from laborious.activities.opc import OPC
     from laborious.activities.storage import Storage
+    from laborious.utils.connectors_config import build_mlflow_config
 
 
 class Activities(Storage, MLFlow, Gates, OPC, ModelMetrics, API):