SIENTIAPDE-1273

Refactor data handling in various modules to ensure DataFrame consistency

- Replaced direct DataFrame instantiation with `ensure_dataframe` utility in Gates, MLFlow, OPC, and ModelMetrics classes to standardize data handling.
- Updated return types in several asynchronous methods to return DataFrames instead of dictionaries for improved usability.
- Adjusted data export processes in workflows to convert DataFrames to dictionaries with `to_dict(orient='records')` for compatibility with downstream systems.

laborious/workflows/drift.py

@@ -93,7 +93,7 @@ class Drift:
                 Activities.export_data_to_postgres,
                 {
                     **metadata,
-                    'data': drift_data,
+                    'data': drift_data.to_dict(orient='records'),
                     'schema': input_data['schema'],
                     'table_name': input_data['target_table_name'],
                     'timestamp_conversion': {'column': 'timestamp', 'format': DATETIME_FORMAT_WITH_TZ},