hippo-tycoon: re-measure the in-play sim bench on a quiet machine #182

Follow-up from #181. The in-play rows in the README table (Match.tick() + snapshot(), 4 bots: TypeScript ~410k vs Rust resident ~630k ticks/s) were measured with a load average of 15–25, and runs varied from 1.2x to 1.9x. Re-run bun bench/sim.ts 200 on an idle machine and update the README numbers so every row comes from the same conditions.