Batch-emit the static weights metadata for every (model, variant) with a
local_subdir — subdir / hf_repo / size_gb / verify_glob / status / kind — as a
single JSON array. The serve-cockpit TUI shells this once to learn where each
slug's weights live + how to fetch them, then stats the dirs itself against its
own (user-configurable) model dir for the download-vs-serve state. Purely
additive: a new subcommand, no FS access, `entry`/`lookup` unchanged.
Foundation for the upcoming Download UX (Download-vs-Start, listing progress).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
