Reduce latency in device capture and parallel encoding

applications/vision/src/main.cpp

components/codecs/include/ftl/codecs/channels.hpp

components/codecs/include/ftl/codecs/encoder.hpp

components/codecs/src/encoder.cpp

components/codecs/src/nvidia_encoder.cpp

components/codecs/src/opencv_encoder.cpp

components/operators/src/depth.cpp

components/rgbd-sources/src/sources/stereovideo/opencv.cpp

components/rgbd-sources/src/sources/stereovideo/opencv.hpp

components/rgbd-sources/src/sources/stereovideo/pylon.cpp

components/rgbd-sources/src/sources/stereovideo/pylon.hpp

...ts/rgbd-sources/src/sources/stereovideo/rectification.cpp

...ts/rgbd-sources/src/sources/stereovideo/rectification.hpp

components/streams/include/ftl/streams/sender.hpp

components/streams/src/sender.cpp