Pair framework: ObservabilityEventAdapter

Pair\Core\ObservabilityEventAdapter is the optional interface for observability adapters that can receive non-span events.

It is intentionally separate from ObservabilityAdapter so existing span-only adapters remain compatible.

use Pair\Core\ObservabilityEvent;
use Pair\Core\ObservabilityEventAdapter;

final class CustomEventAdapter implements ObservabilityEventAdapter {

	public function recordEvent(ObservabilityEvent $event): void {
		error_log(json_encode($event->toArray(), JSON_UNESCAPED_SLASHES));
	}

}

In practice, an adapter that wants both traces and events implements both interfaces.

See also: Observability, ObservabilityAdapter, ObservabilityEvent.