CREATE TABLE template_assist_tasks (
    id            VARCHAR(64) PRIMARY KEY,
    tenant_id     BIGINT NOT NULL REFERENCES tenants(id),
    template_id   BIGINT NOT NULL REFERENCES article_templates(id),
    status        VARCHAR(20) NOT NULL DEFAULT 'queued',
    request_json  JSONB NOT NULL DEFAULT '{}'::jsonb,
    result_json   JSONB,
    error_message TEXT,
    started_at    TIMESTAMPTZ,
    completed_at  TIMESTAMPTZ,
    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_template_assist_tasks_tenant_created
    ON template_assist_tasks(tenant_id, created_at DESC);

CREATE INDEX idx_template_assist_tasks_status_created
    ON template_assist_tasks(status, created_at DESC);