Tracing subscriber prints messages twice

[felinira]

Running the CLI with --debug will print each message twice.

[BlockForge-Dev]

Hi 👋 I’d like to work on this issue if it’s still available. I’ll investigate why the tracing subscriber is printing messages twice when --debug is enabled and propose a fix.

[numbleroot]

@felinira I've opened a PR in #337 which addresses the problem. Please let me know if you agree.