Function initialize_logging_with 

pub fn initialize_logging_with<L>(extra: Option<L>)
where
    L: Layer<FmtSubscriber> + Send + Sync + 'static,

Initializes logging with an optional extra Layer (e.g. an OTel bridge).

The extra layer must implement Layer<FmtSubscriber>. A polymorphic layer like OpenTelemetryTracingBridge satisfies this naturally.