1.0.0

Changelog
All significant changes in one place.

Format based on Keep a Changelog.

[Unreleased]
…
[1.0.0] – 2025-07-21
Initial release:
Core script add_whitelists.sh with dry-run support, -h, -n, -f flags and validation.
Backups and rotation older than 30 days.
Clear documentation in README.md.
MIT license.
CI: ShellCheck workflow.