feat: enhance configuration and scheduling for cleanup processes

- Updated `.env.example` to include new environment variables for MinIO and PyPI configuration.
- Refactored `create_cleanup_schedule` to utilize runtime-specific task queues and improve schedule reconciliation logic.
- Enhanced `Activities` class to require a default bucket in MinIO configuration.
- Adjusted `requirements.txt` to specify version for `evidently`.
- Updated tests to reflect changes in schedule creation and configuration handling.

tests/worker/test_worker.py

@@ -754,7 +754,7 @@ async def test_main_schedule_creation_failure_does_not_stop_worker(
 @patch('model_manager.worker.worker.get_logger')
 @patch('model_manager.worker.worker.start_prometheus_server')
 @patch('model_manager.worker.worker.metrics')
-async def test_main_missing_runtime_fails_fast(
+async def test_main_missing_runtime_uses_single_fallback(
     mock_metrics,
     mock_start_prometheus,
     mock_get_logger,
@@ -771,7 +771,7 @@ async def test_main_missing_runtime_fails_fast(
     mock_prepare_worker,
     mock_logger,
 ):
-    """Test that main() fails fast when RUNTIME is missing."""
+    """Test that main() uses single runtime fallback when RUNTIME is missing."""
     from model_manager.worker.worker import main
 
     mock_get_logger.return_value = mock_logger
@@ -792,11 +792,44 @@ async def test_main_missing_runtime_fails_fast(
     mock_activities.shutdown = Mock()
     mock_activities_class.return_value = mock_activities
 
-    with pytest.raises(ValueError, match='RUNTIME environment variable is required'):
+    mock_runtime = Mock()
+    mock_runtime_class.return_value = mock_runtime
+
+    mock_client_instance = AsyncMock()
+    mock_client_instance.config = Mock(return_value={'plugins': [], 'interceptors': []})
+    mock_client_class.connect = AsyncMock(return_value=mock_client_instance)
+
+    mock_worker_instance = Mock()
+    mock_worker_instance.run = AsyncMock(side_effect=asyncio.CancelledError())
+    mock_prepare_worker.return_value = mock_worker_instance
+
+    mock_plugin_store_instance = AsyncMock()
+    mock_plugin_store_instance.install_runtime = AsyncMock(
+        return_value={'runtime': 'single', 'installed': []},
+    )
+    mock_plugin_store_class.return_value = mock_plugin_store_instance
+    mock_build_plugin_store_config.return_value = {
+        'base_url': 'http://sientia-plugin-store.svc.cluster.local',
+        'owner': 'sientia',
+        'repo': 'model-library-store',
+        'branch': 'main',
+        'username': 'gitea-user',
+        'password': 'gitea-password',
+        'pypi_index_url': 'http://library-distribution-server.library.svc.cluster.local:5000',
+        'pypi_username': None,
+        'pypi_password': None,
+        'cache_ttl_seconds': None,
+    }
+
+    mock_app_up = Mock()
+    mock_metrics.APP_UP.labels.return_value = mock_app_up
+
+    with pytest.raises(SystemExit):
         await main()
 
-    mock_prepare_worker.assert_not_called()
-    mock_start_prometheus.assert_not_called()
+    assert mock_prepare_worker.call_count == 2
+    assert mock_prepare_worker.call_args_list[0].kwargs['runtime'] == 'single'
+    assert mock_prepare_worker.call_args_list[1].kwargs['runtime'] == 'single'
 
 
 @patch('model_manager.worker.worker.asyncio.run')