Enrich tracing with custom metrics

[aoudiamoncef]

Actually, we are mainly using tracing crate for logging.

We go further and add use advanced features which could helps us for bugs, regressions and Network issues ... etc.

Tracing integrations

[aoudiamoncef]

I found a nice article about tracing and telemetry.

Telemetry Rust FR

Having some metrics on critical code sections could help us to detect latencies and regressions.

Cc @damip @AurelienFT