broker: add Event Context() method

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

broker/broker.go

@@ -88,6 +88,8 @@ type BatchHandler func(Events) error
 
 // Event is given to a subscription handler for processing
 type Event interface {
+	// Context return context.Context for event
+	Context() context.Context
 	// Topic returns event topic
 	Topic() string
 	// Message returns broker message

tracer/options.go

@@ -155,7 +155,8 @@ func NewEventOptions(opts ...EventOption) EventOptions {
 // NewSpanOptions returns default SpanOptions
 func NewSpanOptions(opts ...SpanOption) SpanOptions {
 	options := SpanOptions{
-		Kind: SpanKindInternal,
+		Kind:   SpanKindInternal,
+		Record: true,
 	}
 	for _, o := range opts {
 		o(&options)