-- Gateway event journal (§13 POST /gateway). Every stream event is persisted
-- here BEFORE it is emitted, so live streaming and reconnect replay
-- (`resumeFrom`) read the same data and the gateway stays the single audited
-- channel (§15).

CREATE TABLE run_events (
    run_id     UUID NOT NULL REFERENCES agent_runs (id),
    seq        BIGINT NOT NULL,
    event_type TEXT NOT NULL,
    payload    JSONB NOT NULL DEFAULT '{}',
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (run_id, seq)
);