feat(tvix/store): support RUST_LOG env var r/7723

This allows selectively increasing the log level for only parts of the
stack.

For example, the following RUST_LOG env var enables "tracing" level
logging for `tvix_store` and `tvix_castore`, while keeping it at "info"
for the rest of the stack:

export RUST_LOG='info,tvix_store=trace,tvix_castore=trace'

It only affects logs, not traces (if enabled).

Change-Id: Ib936bd132a405f216e75c843db83fbd71d20a18a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11182
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: Connor Brewster <cbrewster@hey.com>

0 files changed, 0 insertions, 0 deletions