Changes to Get Operation Search Availability

the data/rate_limited response's property type changed from object to no type for status 200

removed the required property data/rate_limited/reason from the response with the 200 status

removed the required property data/rate_limited/reset_at from the response with the 200 status

added OperationSearchRateLimit to the data/rate_limited response property allOf list for the response status 200

endpoint added