Function init_observability_with_layer 

pub fn init_observability_with_layer<L>(
    cfg: &ObservabilityConfig,
    platform_layer: Option<L>,
) -> ActorResult<ObservabilityGuard>
where
    L: Layer<Registry> + Send + Sync + 'static,

Initialize logging + (optional) tracing subscriber with a custom platform layer.

This extended API allows platform-specific bindings to inject their own logging layer (e.g., tracing-android for Logcat, tracing-oslog for Apple).

Arguments

• cfg - Observability configuration (filter level, OTel settings)
• platform_layer - Optional custom layer for platform-specific logging. If None, a default fmt::layer() outputting to stderr will be used.

Example

// In libactr for Android:
let android_layer = tracing_android::layer("actr")
    .expect("Failed to create Android layer");
let guard = init_observability_with_layer(&cfg, Some(android_layer.boxed()))?;