Brummel
0426aa6a99
Emits the value its series input carried 'lag' fired cycles ago, held in a node-owned ring (lookbacks()=[1], the past in node state not the input column). Warm-up is skip-emit (None for the first 'lag' cycles — never a fabricated sentinel). Output is a pure function of pre-cycle state, the precondition for a future engine to close a feedback loop (the RTL register C5 names). prevHigh15 = Delay[1] on high15. Build-step 4 of milestone 'Strategy node vocabulary I'. closes #87