Fix: Set flaskdb StatefulSet replicas to 1

[asafchen-dig]

This PR fixes the connectivity issue between petclinic service and petclinic-flaskdb by setting the StatefulSet replica count to 1.

Issue: ff76fc16-81bc-11f0-8462-168ae57aaddf
Change: Updated flaskdb-statefulset.yaml to set replicas: 1

This minimal change will restore service functionality for the /api/clinic-feedback/count endpoint.

[asafchen-dig]

The StatefulSet configuration update looks good, but we also need to update the service configuration to match the StatefulSet labels and ensure proper protocol configuration. Here's the required service manifest:

apiVersion: v1
kind: Service
metadata:
  name: petclinic-flaskdb
  namespace: pet-agentic-dev
  labels:
    app.kubernetes.io/component: petclinic-flaskdb
spec:
  selector:
    app.kubernetes.io/component: petclinic-flaskdb
  ports:
    - name: mongodb
      protocol: TCP
      port: 27017
      targetPort: 27017
  type: ClusterIP

This service configuration:

1. Uses the same label selector as the StatefulSet (app.kubernetes.io/component: petclinic-flaskdb)
2. Configures TCP protocol for MongoDB port
3. Exposes port 27017 for MongoDB connections

Please add this service configuration to complete the fix for the connectivity issue.