CREATE TABLE operation_journal (
 operation_id varchar(128) PRIMARY KEY,
 actor_id varchar(128) NOT NULL,
 request_sha256 char(64) NOT NULL,
 status text NOT NULL,
 receipt jsonb
);
CREATE TABLE transactional_outbox (
 event_id varchar(128) PRIMARY KEY,
 operation_id varchar(128) NOT NULL REFERENCES operation_journal(operation_id),
 status text NOT NULL CHECK(status IN ('PENDING','CLAIMED','PUBLISHED','FAILED')),
 payload jsonb NOT NULL
);