Telemetry setup for the MPC-nodes.

This module centralizes configuration and initialization of observability:

• Reading service name, tracing endpoint and metrics exporter settings from environment variables into TracingConfig, MetricsConfig and related structs.
• Setting up logging/tracing (Datadog or a default tracing-subscriber).
• Installing metrics exporters (Datadog, StatsD or Prometheus) based on the chosen MetricsConfig.

Call initialize_tracing once at startup to configure tracing and metrics.

nodes-telemetry