Make sourceTs and updatedTs fields visible in Get Supply and Get Demand API Responses

As an integration consultant, I need to be able to see when the supply and demand for an item was last updated so I can confirm whether or not information is flowing from external systems to IV.

• The sourceTs and updatedTs will help when performance testing in pre-prod environments enabling us to see when the message was received by IV. We can then compare that to the timestamp the event was sent from the external system to try and identify any latency.

• The sourceTs and updatedTs will also help when trying to determine if a message made it to IV - especially if we have multiple tests occurring at once and the quantity might not change between multiple Syncs.

• Example: sync supply for 100 at 12:00, then adjust supply -50 at 12:03, then adjust supply for 50 at 12:10pm... if we run a get supply we will see the quantity of 100 but we do not know if that is from the 12pm sync supply message (and the 2nd and 3rd messages were ignored or lost) or the 12:10 message after the adjustments were done .

• When testing IV proof of concepts, it will help us determine if message was accepted/ignored when running adjust supply API and sync supply API.

• It will also allow us to know what the last synced sourceTs was so we can increment the timestamp when sending the sourceTs in the request body rather than having to calculate it each time.