C29 compile/unit seam, task 3 of the self-description plan: every
aura-std NodeSchema literal threads its one-line doc. Four texts were
corrected against the actual eval/finalize semantics rather than taken
from the plan table verbatim: Delay is a lag-N register (not one-step),
GatedRecorder flushes an ungated final row at finalize, Latch is a
level-sensitive set/reset register (captures no input), SeriesReducer
emits its single summary row at finalize (not per cycle).
Gate: cargo build -p aura-std --lib clean; full std test run follows at
the all-crates gate once strategy/backtest/engine thread their sites
(the earlier per-crate test gate was unsatisfiable in isolation --
std's dev-deps pull crates whose sites belong to later tasks).
refs #316
Stateless gate, out = (value == target): the i64->bool comparator the
session-breakout strategy needs to turn Session's bars_since_open into
isBar3/isBar5Close (two instances bound to 3 and 5). The operator is topology
(a concrete node type), only target is a knob (C11/C12). Build-step 1 of
milestone 'Strategy node vocabulary I'.
closes#84