Replaces StopRules::default()-all-zeros (the actual cause of the cluster
smoke's n_trades=0, falsifying the CBSW dilution diagnosis) with an
ISV-driven SL + trail-stop controller folded into the existing decision
kernel(s). Per-backtest ATR EMA on mid-price + per-horizon pnl_ema_*
drive distances under max(real, floor) per
pearl_blend_formulas_must_have_permanent_floor. No new kernel; single
source of truth in step_decision*. Folds in the position-target
semantics fix (200-event local repro showed position_lots=199 from
additive-vs-target order semantics) — same commit.
Removes: StopRules, sl_tp_rules, Q1 stopgap field/branch,
use_cold_start_stopgap propagation. Marks CBSW spec + plan SUPERSEDED.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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