create table if not exists backtest_runs (
    id bigserial primary key,
    model_code text not null,
    instrument_id bigint references instruments(id),
    timeframe_set jsonb not null default '{}'::jsonb,
    started_ts timestamptz not null,
    ended_ts timestamptz,
    config jsonb not null default '{}'::jsonb,
    summary jsonb not null default '{}'::jsonb,
    created_at timestamptz not null default now()
);

create index if not exists idx_backtest_runs_model_started_desc
on backtest_runs (model_code, started_ts desc);

create index if not exists idx_backtest_runs_instr_started_desc
on backtest_runs (instrument_id, started_ts desc);