Module telemetry 

Tracing / telemetry configuration.

The SDK emits structured tracing events for every request. OpenTelemetry export is available via the (optional) otel Cargo feature — kept behind a feature flag so default builds stay lean and language SDKs can opt in as needed.

Functions

init_fallback

Initialize a minimal tracing subscriber with RUST_LOG / OPENAPP_SDK_LOG filter support. Safe to call multiple times (no-op after the first call).