Orchestrates one repo's benchmark: auto-discovers representative tasks
(Beamscope.Benchmark.TaskDiscovery), measures the real "no beamscope"
baseline (Beamscope.Benchmark.Baseline) against the real beamscope
Beamscope.Repo output for each, counts real tokens
(Beamscope.Benchmark.Tokenizer), and times both with Benchee for a
repeatable latency comparison — the same methodology used for
docs/search-benchmark-2026-07.md's manual benchmark, automated so it
can be run again and again against any repo.