docs(tvix/castore/directorysvc): document drop without put and close r/6850

As seen in cl/9761, we only use put() and close() in some cases.

Make sure this is documented, so we don't end up having implementations
not able to deal with that.

Change-Id: I406ad23f2f4c9604eca731d898ae41a4663fb846
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9786
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: Connor Brewster <cbrewster@hey.com>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions