Changes to Update a maintenance

the message request property's minLength was increased from 0 to 1

the from response's property format changed from date to date-time for status 200

the to response's property format changed from date to date-time for status 200

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 400

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 401

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 402

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 403

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 404

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 409

added the new SERVICE_UNAVAILABLE enum value to the code response property for the response status 500

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 400

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 401

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 402

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 403

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 404

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 409

added the new TOO_MANY_REQUESTS enum value to the code response property for the response status 500

the from request property format was generalized from date to date-time

the to request property format was generalized from date to date-time

added the non-success response with the status 429

added the non-success response with the status 503