- Create COMPATIBILITY.md with version matrix, Gitea release tracking, template variable reference, and compatibility verification process - Add Gitea 1.25+ | 1.26.4 tested badge to README - Update all 6 READMEs (EN + 5 translations) with latest tested version and link to COMPATIBILITY.md - Include COMPATIBILITY.md in release artifacts Co-Authored-By: Claude <noreply@anthropic.com>