Add grafana summary visualization

[beilineili]

What would you like to be added?

Add display of pod status summary in Grafana, allowing users to understand the root cause of pod delivery errors.

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

There are a large number of key events in the pod lifecycle, and users who lack knowledge related to kubernetes will find it difficult to extract useful information from them. A summary description of errors is needed.

In addition, the user is also unaware of the slo timeout period set by lunettes. We hope to inform users before delivery is completed

[beilineili]

@linuzb @d3c3mber Could you please take a look at my issue and plan to see if they are reasonable? I have proposed a PR #67 on it.