Fields in the Product API are available to retrieve the validity period of an operation, but unfortunately they cannot be added new times via API.
Indeed, the operations.task-durations.validSince field is populated by default with the operation's creation date. And the operations.task-durations.validUntil field is populated by default with the value "Always".
We need to define that an operation has now a different cycle time, and we cannot make that change on the API unless we change the existing cycle time, which will impact historical data.
