Enhance observability

[jyz0309]

What would you like to be added:

• Use Prometheus go client to add more metrics.
• Use OpenTelemetry to add more trace.
• Add config.

Use Prometheus client-go and OpenTelemetry is because they are the most used now. :) Correct me if I am wrong, or if you have better choice, just comment.

Why is this needed:
Observability is very important for basic software architecture.There are three sections in this field.