CREATE TABLE IF NOT EXISTS activity_logs (
    id              BIGSERIAL PRIMARY KEY,
    actor_id        BIGINT NULL,
    actor_role      TEXT NULL,
    action          TEXT NOT NULL,
    resource_type   TEXT NOT NULL,
    resource_id     BIGINT NULL,
    message         TEXT NULL,
    metadata        JSONB NOT NULL DEFAULT '{}'::jsonb,
    ip_address      TEXT NULL,
    user_agent      TEXT NULL,
    created_at      TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS idx_activity_logs_created_at ON activity_logs (created_at DESC);
CREATE INDEX IF NOT EXISTS idx_activity_logs_actor ON activity_logs (actor_id, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_activity_logs_resource ON activity_logs (resource_type, resource_id, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_activity_logs_action ON activity_logs (action, created_at DESC);