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.

values.yaml

@@ -167,9 +167,9 @@ env:
   - name: POSTGRES_PORT
     value: "5432"
   - name: POSTGRES_USER
-    value: "sientia"
+    value: "postgres"
   - name: POSTGRES_PASSWORD
-    value: "sientia"
+    value: "nFqc81y6kwmr2zuAIx43DhiOosFCVPpeEfTtTWZflkNjB2j1KtEeIANkhFR9mAX3"
   - name: POSTGRES_DBNAME
     value: "sientia"
   - name: POSTGRES_MIN_CONNECTIONS