With deduplication, just tracking the total processed bytes can give a false impression of actual progress when uploading files; the user would often see a huge jump when hitting a deduplicated part. This PR allows us to report bytes uploaded or downloaded separately from the bytes processed, which would allow us to correctly surface network utilization.

For example, one possible way to show this would be:

Data Processed      #####################╺━━━━━━━━━━━━━━━━  58% • 1.8/3.1 GB     • 731.6 MB/s • 0:00:10
New Data Uploaded   ######╸━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━   9% • 65.9/731.7 MB  • 131.0 MB/s         • -:--:--
data_up/d2.dat      #############################╸━━━━━━━━  67% • 67.1/100.0 MB  • 568.1 MB/s • 0:00:01