BEGIN;

ALTER TABLE integration_issue
    ADD COLUMN severity varchar(16) NOT NULL DEFAULT 'MEDIUM',
    ADD COLUMN root_cause varchar(4000),
    ADD COLUMN fixed_version varchar(128),
    ADD COLUMN regression_evidence varchar(4000),
    ADD CONSTRAINT integration_issue_severity_check
        CHECK (severity IN ('LOW','MEDIUM','HIGH','CRITICAL'));

CREATE INDEX integration_issue_tenant_severity_status_idx
    ON integration_issue (tenant_id, severity, status, updated_at DESC, id DESC);

COMMENT ON COLUMN integration_issue.severity IS 'Acceptance severity used by the release-blocking summary.';
COMMENT ON COLUMN integration_issue.root_cause IS 'Root-cause conclusion; must not contain transcript, recording content, credentials, or signed URLs.';
COMMENT ON COLUMN integration_issue.fixed_version IS 'Candidate version or immutable build identifier containing the fix.';
COMMENT ON COLUMN integration_issue.regression_evidence IS 'Deidentified evidence references and repeatable regression result.';

COMMIT;