Railbase core v0.43.1

Railbase now includes 21 guided tutorials in English, from first setup and sign-in to everyday work with Acme examples.

• Find lessons in a compact library with six topics, search and progress filters.
• See which lessons you have completed. Completion stays marked when you repeat or pause a lesson.
• Resume saved practice or restart a lesson whenever you need a reminder.
• Explore company structure, employee access, requests and approvals, Workflow Studio, Leonardo, documents, chat, meetings and connecting a phone.

This release provides signed and Apple-notarized macOS installers for Apple Silicon and Intel. Linux amd64/arm64 DEB and RPM packages and the Windows x64 MSI are now also available at v0.43.1. Linux packages are OpenPGP-signed; Windows retains the existing unsigned installer channel. The additional checksums-platforms-v0.43.1.txt covers these packages and the Linux/Windows updater binaries.