* fix: normalize 5-field cron weekday numbers to match standard crontab
The cron crate uses 1=Sun,2=Mon,...,7=Sat while standard crontab uses
0/7=Sun,1=Mon,...,6=Sat. This caused '1-5' to mean Sun-Thu instead of
Mon-Fri. Add a normalization step when converting 5-field expressions
to 6-field so user-facing semantics match standard crontab behavior.
Closes#4049
* chore: ignore RUSTSEC-2024-0384 (unmaintained instant crate via nostr)