2593af86f8
Iteration 1 of cycle 0075: RMetrics.trade_rs (in-memory, serde+eq-excluded) + summarize_r retains it; r_metrics_from_rs pooled reducer; walkforward --strategy + grid flags; strategy-dispatched walkforward_family (SMA arm verbatim); windowed stage1-r helpers (stage1_r_sweep_over reduce-mode IS sweep, run_oos_r non-reduce OOS run, stage1_r_space); pooled oos_r summary. Monte-Carlo bootstrap is iteration 2. refs #139