* AccessControl: Improve folder permissions error handling - Add proper error type handling for folder permission checks - Convert dashboards.ErrFolderNotFound to folder.ErrFolderNotFound - Preserve errutil.Error types when returned - Wrap unhandled errors with new ErrFolderUnhandledError for better error tracking * Apply suggestion from @Copilot Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Update pkg/services/accesscontrol/ossaccesscontrol/folder.go Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>