SIENTIAPDE-1273

Enhance data handling and export processes in Laborious workflows

- Updated `gates.py` to improve data quality validation, filtering, and formatting operations, including enhanced metrics recording.
- Refined `mlflow.py` to better manage model transformations and reference data retrieval from MLflow Model Registry.
- Enhanced `format_and_export_prediction.py` to support separate export of transformed data, improving flexibility in data handling.
- Added comprehensive test coverage for new functionalities, including transformed data formatting and retrain report generation.
- Improved documentation in `README.md` to reflect changes in activities and workflows, ensuring clarity on data processing and export paths.

laborious/activities/gates.py

@@ -405,7 +405,32 @@ class Gates(SientiaMonitoring):
     @activity.defn(name='format_transformed_data')
     async def format_transformed_data(self, input_data: dict[str, Any]) -> dict:
         """
-        Format transformed data according to configured storage policies.
+        Format transformed data for storage and export operations.
+
+        This method formats transformed data from MLFlow model transformations
+        into a standardized format suitable for database storage. It converts
+        wide-format data (columns as variables) into long-format (melted)
+        with proper timestamp handling and model identification.
+
+        The formatting process includes:
+        1. Converting input data dictionary to DataFrame
+        2. Extracting timestamps from DataFrame index
+        3. Resetting index to create sequential row numbers
+        4. Melting data from wide format to long format (variable-value pairs)
+        5. Adding model_id for data lineage tracking
+
+        Args:
+            input_data (dict): Input data containing:
+                - metadata (dict): Workflow execution metadata
+                - data (dict[str, Any]): Transformed data to format (DataFrame-compatible dict)
+                - model_id (str): Unique identifier for the ML model
+
+        Returns:
+            dict: Formatted data dictionary with keys:
+                - timestamp (dict): Timestamp values indexed by row number
+                - variable (dict): Variable names indexed by row number
+                - value (dict): Variable values indexed by row number
+                - model_id (dict): Model identifiers indexed by row number
         """
         metadata = input_data['metadata']
 
@@ -544,7 +569,45 @@ class Gates(SientiaMonitoring):
     @activity.defn(name='format_retrain_report')
     async def format_retrain_report(self, input_data: dict[str, Any]) -> dict:
         """
-        Format retrain report data according to configured storage policies.
+        Format retrain report data for storage and audit trail maintenance.
+
+        This method formats model retraining operation results into a standardized
+        report format suitable for database storage and operational monitoring.
+        It captures retraining status, timestamps, and model version information
+        for comprehensive audit trails and operational visibility.
+
+        The formatting process includes:
+        1. Extracting retraining experiment response data
+        2. Capturing model update report information (version, MLflow IDs)
+        3. Formatting timestamps and status information
+        4. Conditionally including version information for successful retrains
+
+        Args:
+            input_data (dict): Input data containing:
+                - metadata (dict): Workflow execution metadata
+                - experiment_response (dict): Retraining experiment response containing:
+                    - success (bool): Retraining operation success status
+                    - timestamp (str): Timestamp of the retraining operation
+                    - message (str): Status message or error description
+                - update_report (dict): Model update report containing:
+                    - version (str): New model version identifier
+                    - mlflow_run_id (str): MLflow run identifier
+                    - mlflow_experiment_id (str): MLflow experiment identifier
+                - model_id (str): Unique identifier for the ML model
+                - model_name (str): Name of the ML model
+
+        Returns:
+            dict: Formatted retrain report dictionary with keys:
+                - model_id (dict): Model identifiers indexed by row number
+                - model_name (dict): Model names indexed by row number
+                - timestamp (dict): Retraining timestamps indexed by row number
+                - status (dict): Retraining status messages indexed by row number
+                - version (dict, optional): Model versions indexed by row number
+                    Only included if experiment_response['success'] is True
+                - mlflow_run_id (dict, optional): MLflow run IDs indexed by row number
+                    Only included if experiment_response['success'] is True
+                - mlflow_experiment_id (dict, optional): MLflow experiment IDs indexed by row number
+                    Only included if experiment_response['success'] is True
         """
         metadata = input_data['metadata']
         self.info('Formatting retrain report...', metadata)

laborious/activities/mlflow.py

@@ -424,14 +424,30 @@ class MLFlow(SientiaMonitoring):
         """
         Get reference data from the MLflow Model Registry.
 
+        This method retrieves evaluation reference data stored as artifacts in the
+        MLflow Model Registry. The reference data is typically used for model
+        drift detection, performance comparison, and quality validation. The method
+        loads the data from a CSV artifact file and formats timestamps for
+        consistent processing.
+
+        The method handles:
+        1. Loading evaluation data artifact from MLflow Model Registry
+        2. Timestamp parsing and formatting for consistency
+        3. Data conversion to dictionary format for workflow consumption
+        4. Graceful handling of missing reference data
+
         Args:
             input_data (dict): Input data containing:
                 - metadata (dict): Workflow execution metadata
                 - model_name (str): Name of the MLFlow model to get reference data from
 
         Returns:
-            list[dict[Hashable, Any]] | None: Reference data from the MLflow Model Registry.
+            list[dict[Hashable, Any]] | None: Reference data from the MLflow Model Registry
+                as a list of dictionaries. Returns None if reference data is not found
+                or if the artifact does not exist.
 
+        Raises:
+            Exception: If artifact loading fails or encounters errors during processing
         """
 
         metadata = input_data['metadata']