d23e208430
Three more read-only compiler-API readers on the TypeId-handle shape, each backed
by a new TypeTable query that both the legacy handler and the VM call (no drift):
type_nominal_name(t: TypeId) -> StringId (nominalName; loud-bail for unnamed types)
type_field_name(t: TypeId, idx: i64) -> StringId (memberName)
type_field_type(t: TypeId, idx: i64) -> TypeId (memberType)
All loud-bail on out-of-range idx / no-member — no silent default. First multi-arg
compiler fns (callCompilerFn now reads arg 1 = idx); added Vm.argHandle/argTypeId
range-checked arg readers and moved find_type/type_field_count onto them. Names use
the type_* family to avoid colliding with the std metatype builtins (field_name /
type_name in core.sx); the new TypeTable.nominalName is distinct from the existing
typeName(id) display-string renderer.
Example 0629 reflects Pair { lo: Point; hi: Point } — each field name + the nominal
name of a field's type, #run-folded, VM-HANDLED natively. VM unit test added.
Parity 690/690 (gate OFF and -Dcomptime-flat).
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