All 137 settings with type/default/category/UI control/consumer citation,
the self-describing .usd table grammar (parsed from the decompile and
verified against defaultsettings.usd), profile selection and /vt opt.
MossTank gap: no .usd reader/writer, BuffProfileDocument drops ten fields,
RechargeHandlerSet opaque; setting-name coverage is already 137/137.
Lead spot-check: f3 accessors, the four reader classes, catalog count.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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