Function capability_facts 

pub fn capability_facts(
    inventory: &FbxScaleCapabilityInventory,
) -> ScaleCapabilityFacts

Project an FBX inventory into the format-neutral core capability gate.

coverage means every Appendix D.4 domain has an explicit status, not that any domain is preserved losslessly. Support remains false: normalized transform stacks, baked curves, rebuilt meshes, and unverifiable raw payload relationships are recorded as unsupported facts rather than hidden behind absent flags.