feat: add AlmaLinux support

[lengau]

Summary

AlmaLinux is a free, open-source, community-driven enterprise Linux distribution that is binary-compatible with Red Hat Enterprise Linux (RHEL). It was founded by CloudLinux as a direct response to CentOS's shift away from being a stable RHEL downstream. AlmaLinux OS Foundation governs the project and releases updates to track RHEL closely.

Lifecycle Data Source

AlmaLinux follows a 10-year support lifecycle per major version, matching RHEL. Each major release receives full (active) support for the first ~5 years and then transitions to a security maintenance phase.

Official sources:

• https://almalinux.org/blog/ — release announcements with release dates
• https://wiki.almalinux.org/ — AlmaLinux Wiki with support policy and release notes
• https://wiki.almalinux.org/Comparison.html — comparison and lifecycle overview
• https://endoflife.date/almalinux — aggregated lifecycle data page

Machine-readable data:

The endoflife.date API provides structured lifecycle data:

• API endpoint: https://endoflife.date/api/almalinux.json
• Sample data (as of 2026-04-21):
  • AlmaLinux 10: released 2025-05-27, full support until 2030-05-31, EOL 2035-05-31
  • AlmaLinux 9: released 2022-05-26, full support until 2027-05-31, EOL 2032-05-31
  • AlmaLinux 8: released 2021-03-30, full support until 2024-05-01, EOL 2029-03-01

Notes

• AlmaLinux tracks RHEL releases closely, so lifecycle dates mirror RHEL.
• The AlmaLinux wiki and official blog are the canonical sources for release and EOL dates.
• No standalone machine-readable lifecycle file is published on almalinux.org; endoflife.date is the best structured source.