Proposal - Bastien Desert "Enhance fs to examine path components"

Users who want to understand how the AFS cache manager resolves each element of a path (plain directory, mount point, or symlink) must manually run fs examine and fs lsmount on each component separately, or write wrapper scripts. This project implements a new fs pathinfo subcommand in C that walks a given path, iteratively resolves each prefix using the existing pioctl interface (VIOC_AFS_STAT_MT_PT, VIOC_FILE_CELL_INFO, lstat), and reports the type of each component in a human-readable format consistent with existing fs output. Deliverables include: the subcommand implementation integrated into src/venus/fs.c, support for both relative and absolute paths, a -verbose flag, a fs_pathinfo(1) man page in POD format, and a regression test suite covering all major path resolution scenarios.