betting_combat.rounds.backtest

The backtest / execution engine: fills from the trade tape, sizing under caps, routing across instruments, and the statistics a configuration is judged by (research ufc/modeling/execution.py, ufc/modeling/capacity.py).

General on purpose: it takes events (a DataFrame of candidate bets), trade tapes and quotes as arguments and a frozen BacktestConfig for every setting; no file IO, no module state. The same engine serves the research parity tests, the weekly validation and later the event bars.