Allow querying for *last* gate change

[krowvin]

Query for a projects last known gate change

How do you go about getting the last gate change without specifying a large range, possibly pulled from the TS extents as a guess? (I don't think we have another way to determine the life of a project via API)

For example you have a project that had a gate change 7 years ago. Would I have to query 40 years of data just to be sure we get the last gate change? Maybe a feature request?

Suggest we add an endpoint that allows you to get the last gate change of a project and a cursor in that point in time (i.e. a page that lets you move backwards through the changes - assuming this is the latest)