tracing

type Event interface{}

type Handler interface {
	// Tracer creates a new tracer with the given name.
	Tracer(ctx context.Context, name string) trace.Tracer

	// Span creates a new span with the context.
	Span(ctx context.Context, handler func(context.Context))

	// AddEvent adds a new event with the given name and attributes to the span.
	AddEvent(ctx context.Context, event Event)
}

type KeyValue struct {
	Key   string
	Value string
}