perf(bench): lower default warmup from 3 to 2#140
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Reduces hyperfine
--warmupfrom 3 to 2 in both the action input default andrun.sh's baseline. Across the full FerrFlow matrix (6 fixtures × ~7 tool/method pairs × ~5 commands) that's one fewer warmup iteration per measured command — roughly 10% of the bench wall-time. Variance of the timed runs is not measurably affected (one cold pass + one settled pass is enough to prime the OS page cache and FS readahead reliably).Consumers can still override via
with.warmup: '3'if they want the old behaviour on a noisy host.