feat(go): publish realtime fields stream

go/vehicle-gateway/internal/eventbus/durable_sink_test.go

@@ -300,6 +300,11 @@ func (s *scriptedSink) PublishUnified(context.Context, envelope.FrameEnvelope) e
 	return nil
 }
 
+func (s *scriptedSink) PublishFields(context.Context, envelope.FrameEnvelope) error {
+	s.calls = append(s.calls, "fields")
+	return nil
+}
+
 func (s *scriptedSink) Close() error {
 	return nil
 }
@@ -323,6 +328,10 @@ func (s *contextCheckingReplaySink) PublishUnified(ctx context.Context, _ envelo
 	return s.unifiedCtxErr
 }
 
+func (s *contextCheckingReplaySink) PublishFields(ctx context.Context, _ envelope.FrameEnvelope) error {
+	return ctx.Err()
+}
+
 func (s *contextCheckingReplaySink) Close() error {
 	return nil
 }
@@ -350,6 +359,10 @@ func (s *batchRecordingSink) PublishUnified(context.Context, envelope.FrameEnvel
 	return nil
 }
 
+func (s *batchRecordingSink) PublishFields(context.Context, envelope.FrameEnvelope) error {
+	return nil
+}
+
 func (s *batchRecordingSink) Close() error {
 	return nil
 }