[Enhancement]: opentelemetry integration

[LorenzoTettamanti]

This issue represents a key point where the project needs to integrate with the existing project to enhance the reliability of the overall project. Nowadays, OpenTelemetry is the industry standard for collecting and exporting metrics, logs, and traces in a consistent and vendor-agnostic way.
By integrating it, the CortexBrain core will be able to expose runtime data to multiple backends such as Grafana, Jaeger, Tempo, or Datadog, enabling better insight into system performance and behavior.

opentelemetry rust API

Tasks:

• Create a shared module to refine and process the incoming data from eBPF
• Connects the data from the identity service and metrics service
• Expose the data using the OTLP protocol