BEGIN;

ALTER TABLE idempotency_record
    ADD COLUMN actor_key varchar(500) NOT NULL DEFAULT 'urn:legacy:unknown';

ALTER TABLE idempotency_record
    DROP CONSTRAINT idempotency_record_tenant_id_scope_idempotency_key_key;

ALTER TABLE idempotency_record
    ADD CONSTRAINT idempotency_record_actor_scope_key
        UNIQUE (actor_key, scope, idempotency_key);

CREATE INDEX idempotency_record_tenant_scope_idx
    ON idempotency_record (tenant_id, scope, created_at DESC);

ALTER TABLE outbox_event
    ADD COLUMN deduplication_key varchar(255),
    ADD COLUMN payload_hash char(64) NOT NULL DEFAULT repeat('0', 64),
    ADD COLUMN dead_at timestamptz;

CREATE UNIQUE INDEX outbox_event_deduplication_key
    ON outbox_event (
        COALESCE(tenant_id, '00000000-0000-0000-0000-000000000000'::uuid),
        event_type,
        deduplication_key
    )
    WHERE deduplication_key IS NOT NULL;

CREATE INDEX outbox_event_stale_lock_idx
    ON outbox_event (locked_at)
    WHERE status = 'processing';

COMMIT;