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/utils/connectors_config.py

@@ -2,6 +2,7 @@ import json
 from os import getenv
 from typing import Any
 
+
 def build_mlflow_config() -> dict[str, Any]:
     """
     Build MLFlow server configuration from environment variables.
@@ -66,6 +67,7 @@ def build_opc_config() -> dict[str, Any]:
         }
     }
 
+
 def build_minio_config() -> dict[str, Any]:
     """
     Build MinIO (S3-compatible) configuration from environment variables.