SIENTIAPDE-1478

Refactor Activities and API Integration for PI Web API

- Reintroduced the API import in the Activities class for proper integration.
- Cleaned up whitespace and formatting in the API class and related tests for improved readability.
- Updated test cases to ensure consistent formatting in error messages and configuration structures for PI Web API.
- Enhanced connectors_config.py with additional whitespace for better organization.

laborious/activities/activities.py

@@ -7,12 +7,12 @@ with workflow.unsafe.imports_passed_through():
     from sientia_do.notifications.handlers import CoreNotificationHandler as NotificationHandler
     from sientia_do.observability.logger import Logger
 
+    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.activities.api import API
 
 
 class Activities(Storage, MLFlow, Gates, OPC, ModelMetrics, API):
@@ -147,4 +147,4 @@ class Activities(Storage, MLFlow, Gates, OPC, ModelMetrics, API):
         Gates.close(self)
         await OPC.close(self)
         ModelMetrics.close(self)
-        API.close(self)
+        API.close(self)