fix: defer nvtake to slackrepo confirm

nvchecker's oldver is now synced (nvtake) only when the slackrepo prompt
is confirmed, per package, just before slackrepo runs. Moved out of the
hint-rewrite step in --check and the version-accept step in --hintfile
(both now route through run_slackrepo). Confirming slackrepo acknowledges
the versions; a stopped/failed slackrepo can be rerun without nvchecker
re-reporting already-committed versions.

Fixes the stuck state where interrupting a run between hint-rewrite and
slackrepo left oldver behind the hint, so nvchecker logged a phantom
'updated' line every subsequent --check.

Tests T20/T23 answer Y to slackrepo so nvtake fires. Dead
check_nvchecker_take flag removed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

0 files changed, 0 insertions, 0 deletions