Print OpenTelemetry configuration on startup

[paapug]

Currently, the application prints configuration details on startup using a function in Config.scala. To improve observability and debugging, extend this functionality to also print OpenTelemetry (otel) related configuration options on startup. These should include:

• Whether otel is enabled
• The otel endpoint
• The protocol being used
• The service name

This will help users verify their tracing setup and make troubleshooting easier.