SIENTIAPDE-1478

Refactor metrics and imports across multiple files

- Removed unused import of CORE_LABELS in metrics.py.
- Updated import statements in api.py for consistency.
- Cleaned up import order in worker.py for better readability.
- Added missing newline at the end of metrics.py.
- Adjusted formatting in core_scouter.py to ensure proper syntax.
- Removed redundant 'on_conflict' and 'unique_columns' keys from test cases in test_core_scouter.py for clarity.

scouter/workflow/sub_workflows/core_scouter.py

@@ -109,7 +109,7 @@ class CoreScouter:
                 'schema': input_data['schema'],
                 'table_name': input_data['table_name'],
                 'data': held_data,
-                'timestamp_conversion': {'column': 'timestamp', 'format': DATETIME_FORMAT_WITH_TZ}
+                'timestamp_conversion': {'column': 'timestamp', 'format': DATETIME_FORMAT_WITH_TZ},
             },
             retry_policy=retry_policy,
             start_to_close_timeout=timedelta(seconds=60),