Executable spec for the by-chance vocabulary gaps: an RSI-like
gain/loss-split-and-ratio composition authored purely as blueprint
data (Const/Div/Abs/Max/Min) must load through std_vocabulary, build,
and run to hand-computed RS values (2.0 at t3, 3.0 at t4 over
10,12,11,14). Fails with UnknownNodeType(Const) — feature absent.
Const is unary with an f64 'value' param (clock input, value ignored)
mirroring EqConst's constant-as-param pattern; Div/Max/Min binary
mirroring Add/Sub; Abs unary mirroring Sqrt; Div follows IEEE-754.
refs #236
