Plugin skills are now de-duplicated against user-level skills and other plugins by real path

When Claude Code loads skills (packaged instructions for a particular kind of task) bundled inside a plugin, it now checks whether that same skill file, resolved to its real underlying file path, is already loaded either as a personal user-level skill or by another plugin. If so, the duplicate is skipped rather than loaded twice, and a log message names which duplicate was skipped and why.