BEGIN;
CREATE TABLE device_ble_binding (
    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    token_hash char(64) NOT NULL UNIQUE,
    device_id uuid NOT NULL,
    tenant_id uuid NOT NULL,
    user_id uuid NOT NULL REFERENCES user_account(id),
    household_id uuid NOT NULL,
    subject_id uuid NOT NULL,
    expected_generation bigint NOT NULL,
    status text NOT NULL DEFAULT 'PENDING' CHECK(status IN ('PENDING','COMMITTED','CANCELLED')),
    expires_at timestamptz NOT NULL,
    binding_id uuid REFERENCES device_binding(id),
    created_at timestamptz NOT NULL DEFAULT now(),
    completed_at timestamptz,
    FOREIGN KEY(device_id,tenant_id) REFERENCES device(id,tenant_id),
    FOREIGN KEY(household_id,tenant_id) REFERENCES household(id,tenant_id),
    FOREIGN KEY(subject_id,tenant_id) REFERENCES subject_profile(id,tenant_id)
);
CREATE INDEX device_ble_binding_device ON device_ble_binding(device_id,created_at DESC);
CREATE UNIQUE INDEX device_ble_binding_one_pending_actor ON device_ble_binding(device_id,user_id) WHERE status='PENDING';
COMMIT;