v0.48.0

The scene upload pass records the instances' changes and the pool's new meshes, with barriers placed by the graph from declared accesses instead of the frame-start uploads' full ALL_COMMANDS barriers (#159, part of #92). Frames recorded without a graph upload at the frame's start as before; textures still do. Known: on the integrated GPU of a Ryzen 9 9950X3D, SceneSyncTest now loses the device every run (#151).