`MemoryActorContractClauseView` is the closed typed variant matching the
schema-specific clause records above. It exposes typed enum, boolean, exact
`SyncScopeRef`, and compare-exchange ordering-pair ranges; it is not a map of
field names to values. Every external typed value persists through canonical
bytes produced and validated by its semantic owner. C++ enum values, TableGen
case numbers, and declaration order are implementation details and cannot be
used as a persistent codec. Pair arrays sort lexicographically by owner
canonical bytes.