BEGIN;

ALTER TABLE ops_config_evaluation
    ADD COLUMN evidence_type varchar(32) NOT NULL DEFAULT 'GENERIC',
    ADD CONSTRAINT ops_config_evaluation_type_check
        CHECK (evidence_type IN ('GENERIC', 'AGENT_QUALITY_V1'));

CREATE INDEX ops_config_evaluation_type_result_idx
    ON ops_config_evaluation(tenant_id, config_version_id, evidence_type, result, evaluated_at DESC);

COMMIT;