- CHANGELOG_REFACTOR.md: translated sections 1-16 (header + §1-§16) from
Italian to English; sections 17-18 were already English and left untouched.
All code blocks, commit hashes, tables, names, versions and structure kept.
- DIAGNOSI_GUI.md -> GUI_DIAGNOSIS.md: renamed and fully translated to
English (title included), preserving code, line refs, emojis and tables.
- REPORT_NETWORKING_PARALLELO.md -> PARALLEL_NETWORKING_REPORT.md: renamed
only (content was already in English).
- CHANGELOG.md: added entry #12 documenting this task.
Documentation-only change; no plugin code touched (zip-first not applicable).
