SIENTIAPDE-1712

Update environment variables in values.yaml and enhance metric labels in metrics.py

- Changed POSTGRES_USER and POSTGRES_PASSWORD values in values.yaml for improved security.
- Added 'runtime' label to metrics in metrics.py for better environment identification.
- Updated CORE_LABELS to include 'runtime' for consistency across metrics.
- Modified type hint for data parameter in PredictionProcess to use a dictionary for better clarity.
- Adjusted tests to reflect changes in core labels and MinIO configuration.

laborious/metrics.py

@@ -18,6 +18,7 @@ Key Metric Categories:
 
 Metric Labels:
 - pod_id: Kubernetes pod identifier for multi-instance deployments
+- runtime: Runtime / environment identifier (matches ``RUNTIME`` env, see ``SientiaMonitoring``)
 - model_name: Name of the ML model being used
 - workflow_name: Name of the prediction pipeline
 - opc_server_id: Identifier for OPC server operations
@@ -35,8 +36,8 @@ APP_UP = Gauge(
     ['pod_id'],
 )
 
-# Core labels used across multiple metrics
-CORE_LABELS = ['pod_id', 'model_name', 'workflow_name']
+# Core labels used across multiple laborious metrics (aligned with ``SientiaMonitoring.labels`` subset)
+CORE_LABELS = ['pod_id', 'runtime', 'model_name', 'workflow_name']
 
 # Prediction operation metrics
 PREDICTIONS_WRITTEN_COUNT = Counter(