//! Optional integrations, each behind a cargo feature.
//!
//! - `anyhow` → [`anyhow`]: capture an `anyhow::Error` with its origin backtrace.
//! - `log` → [`log`]: a `log::Log` sink that forwards records to ErrSight.
//! - `tracing` → [`tracing`]: a `tracing_subscriber::Layer` for events/breadcrumbs.