TCP: Allow to get written image count

image_pusher/TCPStreamPusher.cpp

@@ -168,16 +168,11 @@ bool TCPStreamPusher::SendCalibration(const CompressedImage &message) {
     return socket[0]->Send(serialization_buffer.data(), serializer.GetBufferSize(), TCPFrameType::CALIBRATION);
 }
 
-std::optional<ImagePusherAckProgress> TCPStreamPusher::GetAckProgress() const {
-    ImagePusherAckProgress out{
-    };
+std::optional<uint64_t> TCPStreamPusher::GetImagesWritten() const {
+    uint64_t ret = 0;
     for (const auto &s : socket) {
         auto p = s->GetDataAckProgress();
-        out.data_sent += p.data_sent;
-        out.data_acked_ok += p.data_acked_ok;
-        out.data_acked_bad += p.data_acked_bad;
-        out.data_acked_total += p.data_acked_total;
-        out.data_ack_pending += p.data_ack_pending;
+        ret += p.data_acked_ok;
     }
-    return out;
+    return ret;
 }