Optional causal embedding

Scheduled ancestry, actual operational influence, and $⪯$ remain three different relations. Channels may fail to use a scheduled edge, while entanglement may produce correlations without intervention-induced signalling. The embedding contract does not reconstruct the supplied relation from the program.

These distinctions match VII-J's two targets: complete decoded simulation and physical embedding of the actual elementary operations CheungVIIJ. They do not derive a Lorentz-invariant speed or select a Lorentz cone; En08-A's scheduler-consistency separation remains applicable CheungEn08A.

If a fixed geometric packet or a source-replacement controller is attached, its matching certificates, guards, and residual ownership must also be supplied. The VIII constructions are comparisons for such contracts, not a geometric conclusion of the clock-readout theorem CheungVIII.