Removed the benchmark result-reuse feature: new benchmark runs no longer silently import results from previous completed runs with matching search settings. The compatibility check covered only a handful of settings (ignoring evaluation config, dataset versions, and the rest of the configuration), so results produced under different conditions could contaminate a run's accuracy, and the reuse accounting could report more than 100% completion. Every run now researches its own sampled questions and reports only its own results.
