create table if not exists decision_packets (
    id bigserial primary key,
    instrument_id bigint not null references instruments(id),
    trading_plan_id bigint references trading_plans(id),
    candidate_id bigint references trade_plan_candidates(id),
    signal_id bigint references trade_signals(id),
    execution_ticket_id bigint references execution_tickets(id),
    packet_ts timestamptz not null,
    status text not null,
    action_recommendation text not null,
    quality_score numeric,
    ai_explanation text,
    payload jsonb not null default '{}'::jsonb,
    created_at timestamptz not null default now()
);

create index if not exists idx_decision_packets_instrument_ts_desc
on decision_packets (instrument_id, packet_ts desc, id desc);

create table if not exists decision_alerts (
    id bigserial primary key,
    instrument_id bigint not null references instruments(id),
    decision_packet_id bigint references decision_packets(id),
    alert_key text not null unique,
    alert_type text not null,
    status text not null,
    channel text not null default 'workbench',
    message text not null,
    payload jsonb not null default '{}'::jsonb,
    created_ts timestamptz not null,
    delivered_ts timestamptz
);

create index if not exists idx_decision_alerts_instrument_ts_desc
on decision_alerts (instrument_id, created_ts desc, id desc);