Add grafana summary users' feedback

### What would you like to be added?

Add user feedback on whether the pod summary results provided by Lunettes are satisfactory in Grafana, and store the feedback, summary, and corresponding pod information in the Elasticsearch backend, to help Lunettes contributors improve the quality of the summary.

### Why is this change required? What problem does it solve?

Lunettes lacks an evaluation metric that can help developers measure the quality of summary results. Such a collection and storage ability for user feedback can better improve the accuracy and quality of summary.