Investigate why not all downloads from EarthWorks are being reported in metrics on PURL

[amyehodge]

Earlier today I downloaded content from https://earthworks.stanford.edu/catalog/stanford-zh181bb7989 using the "Original shapefile" button under the download section on the right-hand side of the page. This accesses a stacks.stanford.edu URL, which is expected to log a download via Ahoy. @thatbudakguy verified that this did indeed register a download in the database.

However, I had checked the PURL page at https://purl.stanford.edu/zh181bb7989 prior to downloading the file and then after, and noticed that the download count did not increase.

I later tried this as well for the "Original shapefile" download at https://earthworks.stanford.edu/catalog/stanford-hp348jr8547. This time the PURL page did show an increment in the download count.

I would expect both of these actions to increase the reported download count on PURL. This ticket is to investigate why this is not happening and suggest/implement a solution for this.

[thatbudakguy]

this almost certainly has to do with the way events are unique'd by visit; I could see all of the events being logged, but the count of unique events did not go up.