qt5-webglplugin

• Path: arch/maintained/qt5-webglplugin
• Build failure during the 2026-07-07 “build all packages for x86_64” private-repo release pass. Needs qt5-websockets, not in this arch/ tree (external-dependency class, see memory/dbmodel-qt4.md). Not fixed as part of this pass.
• 2026-08-02: fixed. Vendored qt5-websockets from AUR (see memory/qt5-websockets.md). Built+published cleanly (5.15.19-1, + qt5-webglplugin-debug), x86_64.