-- 007_podium.sql — add podium to finished_races.
--
-- Podium is the top-3 finishers of a completed race. Stored as JSONB
-- (a small ordered list, rarely queried as a relation). Shape per row:
--   { "position": 1, "driver_id": "driver-alice",
--     "name": "driver-alice", "total_time_ms": 123456 }
--
-- Ordering: position 1 first.
-- GIN index over the jsonb lets future UI filters (e.g. "races won by
-- driver X") use @> containment queries without a schema change.

ALTER TABLE finished_races
    ADD COLUMN IF NOT EXISTS podium JSONB NOT NULL DEFAULT '[]'::jsonb;

CREATE INDEX IF NOT EXISTS finished_races_podium_gin
    ON finished_races USING GIN (podium);