- Add os_images table with linode_image_id and vultr_os_id columns
- Support Ubuntu (24.04, 22.04), Debian (11-13), AlmaLinux (8-9),
Rocky Linux (8-9), and Fedora 42
- AlmaLinux and Rocky Linux added as CentOS migration alternatives
- Default OS changed from ubuntu_22_04 to ubuntu_24_04
- Fix Vultr OS IDs (1743=22.04, 2284=24.04)
- Remove hardcoded OS validation, validate against DB
- Return available OS list in error message for invalid image
Migration: migrations/003_os_images.sql
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
