SIENTIAPDE-1712

Refactor metrics and API handling for improved consistency and clarity

- Removed the SIENTIA_CORE_LABELS constant and replaced it with CORE_LABELS for uniformity across metrics.
- Updated the API class to ensure operation_type is always included in core labels for PI Web API metrics.
- Simplified metric tag handling in the Gates class by consolidating common tags into a single core_tags dictionary.
- Enhanced the PredictionProcess class to improve error handling and variable naming for clarity.

tests/laborious/activities/test_api.py

@@ -81,18 +81,17 @@ def test_get_pi_web_api_core_labels_without_operation_type(mock_pi_web_api_clien
             'runtime': 'local',
             'model_name': 'test_model',
             'workflow_name': 'test_workflow',
-            'operation_type': '-',
+            'operation_type': 'write_pi_web_api_data',
         },
     ):
-        labels = api_instance.get_pi_web_api_core_labels(
-            metadata=metadata['metadata'], operation_type=None
-        )
-    assert 'operation_type' not in labels
+        labels = api_instance.get_pi_web_api_core_labels(metadata=metadata['metadata'])
+    assert labels['operation_type'] == 'write_pi_web_api_data'
     assert labels == {
         'pod_id': 'test_pod',
         'runtime': 'local',
         'model_name': 'test_model',
         'workflow_name': 'test_workflow',
+        'operation_type': 'write_pi_web_api_data',
     }