SIENTIAPDE-1174

Update dependencies, modify replica count, and implement metrics tracking

- Updated sientia-dataops-library version from 1.3.5 to 1.3.7 in requirements.txt.
- Changed replicaCount in values.yaml from 5 to 3 and incremented image tag from 0.2.7 to 0.3.1.
- Added Prometheus metrics tracking in gates.py and worker.py, including a new write_metrics method.
- Configured Prometheus service and ServiceMonitor in values.yaml for metrics collection.

laborious/utils/repository/model_repository.py

@@ -68,7 +68,7 @@ class MLFlowRepository():
         try:
             start_time = datetime.now()
             data = self.model_serving.get_cached_predict(
-                model_name, data, model_retention)[-1:]
+                model_name, data, model_retention)[0:1]
 
             end_time = datetime.now()
             data = pd.DataFrame(data, columns=['prediction'])