fix(tvix/castore/blobservice): update bytes_read only on successful read r/7922

We previously updated this.pos also in case the underlying read returned
an error.

Also, use the ready! macro to remove the match block, and instrument
errors returned during start_seek.

Change-Id: Ic32e26579d964a76b45687134acc48d72d67c36f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11421
Reviewed-by: Brian Olsen <me@griff.name>
Reviewed-by: Connor Brewster <cbrewster@hey.com>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>

0 files changed, 0 insertions, 0 deletions