Changes to List contract entities on network

the response property _status/messages/items/data became nullable for the status 400

the response property _status/messages/items/detail became nullable for the status 400

the response property contracts/items/admin_key became nullable for the status 200

the response property contracts/items/auto_renew_account became nullable for the status 200

the response property contracts/items/auto_renew_period became nullable for the status 200

the response property contracts/items/contract_id became nullable for the status 200

the response property contracts/items/created_timestamp became nullable for the status 200

the response property contracts/items/expiration_timestamp became nullable for the status 200

the response property contracts/items/file_id became nullable for the status 200

the response property contracts/items/max_automatic_token_associations became nullable for the status 200

the response property contracts/items/nonce became nullable for the status 200

the response property contracts/items/obtainer_id became nullable for the status 200

the response property contracts/items/permanent_removal became nullable for the status 200

the response property contracts/items/proxy_account_id became nullable for the status 200

the response property contracts/items/timestamp/to/allOf[#/components/schemas/TimestampNullable] became nullable for the status 200

the response property links/next became nullable for the status 200