SpanEventKey is the key used by the Otel handler to inject the log record in the recording span, as a span event.

SpanIDKey is the key used by the Otel handler to inject the span ID in the log record.

TraceIDKey is the key used by the Otel handler to inject the trace ID in the log record.

OtelHandler is an implementation of slog's Handler interface.

HandlerFn defines the handler used by slog.Handler as return value.