SIENTIAPDE-1205

Refactor OpcRepository and update tests for async handling

- Removed the shutdown method from OpcRepository and adjusted the disconnect logic.
- Updated tests in test_activities.py and test_opc.py to support async shutdown functionality.
- Enhanced test cases in test_opc_repository.py to ensure proper async behavior and error handling in OpcRepository methods.

run_coverage.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Exit on any error
+set -e
+
+echo "Activating virtual environment..."
+source ./venv/bin/activate
+
+pytest --cov=laborious --cov-report=html
+
+xdg-open htmlcov/index.html